trader-mcp/tests/test_strategies.py

from __future__ import annotations

from pathlib import Path
from tempfile import TemporaryDirectory

from fastapi.testclient import TestClient

from src.trader_mcp import strategy_registry, strategy_store
from src.trader_mcp.server import app
from src.trader_mcp.strategy_context import StrategyContext
from src.trader_mcp.strategy_sdk import Strategy as BaseStrategy
from strategies.exposure_protector import Strategy as ExposureStrategy
from strategies.grid_trader import Strategy as GridStrategy
from strategies.trend_follower import Strategy as TrendStrategy


STRATEGY_CODE = '''
from src.trader_mcp.strategy_sdk import Strategy

class Strategy(Strategy):
    def init(self):
        return {"started": True, "config_copy": dict(self.config)}
'''


def test_strategies_endpoints_roundtrip():
    with TemporaryDirectory() as tmpdir:
        strategy_store.DB_PATH = Path(tmpdir) / "trader_mcp.sqlite3"
        from src.trader_mcp import strategy_registry

        strategy_registry.STRATEGIES_DIR = Path(tmpdir) / "strategies"
        strategy_registry.STRATEGIES_DIR.mkdir()
        (strategy_registry.STRATEGIES_DIR / "demo.py").write_text(STRATEGY_CODE)
        client = TestClient(app)

        r = client.get("/strategies")
        assert r.status_code == 200
        body = r.json()
        assert "available" in body
        assert "configured" in body

        r = client.post(
            "/strategies",
            json={
                "id": "demo-1",
                "strategy_type": "demo",
                "account_id": "acct-1",
                "client_id": "strategy:test",
                "mode": "observe",
                "config": {"risk": 0.01},
            },
        )
        assert r.status_code == 200
        assert r.json()["id"] == "demo-1"

        r = client.get("/strategies")
        assert any(item["id"] == "demo-1" for item in r.json()["configured"])

        r = client.delete("/strategies/demo-1")
        assert r.status_code == 200
        assert r.json()["ok"] is True


def test_strategy_context_binds_identity(monkeypatch):
    calls = {}

    def fake_place_order(arguments):
        calls["place_order"] = arguments
        return {"ok": True}

    def fake_open_orders(account_id, client_id=None):
        calls["open_orders"] = {"account_id": account_id, "client_id": client_id}
        return {"ok": True}

    def fake_cancel_all(account_id, client_id=None):
        calls["cancel_all"] = {"account_id": account_id, "client_id": client_id}
        return {"ok": True}

    monkeypatch.setattr("src.trader_mcp.strategy_context.place_order", fake_place_order)
    monkeypatch.setattr("src.trader_mcp.strategy_context.list_open_orders", fake_open_orders)
    monkeypatch.setattr("src.trader_mcp.strategy_context.cancel_all_orders", fake_cancel_all)

    ctx = StrategyContext(id="inst-1", account_id="acct-1", client_id="client-1", mode="active")

    ctx.place_order(side="sell", market="xrpusd", order_type="limit", amount="10", price="2")
    ctx.get_open_orders()
    ctx.cancel_all_orders()

    assert calls["place_order"]["account_id"] == "acct-1"
    assert calls["place_order"]["client_id"] == "client-1"
    assert calls["open_orders"] == {"account_id": "acct-1", "client_id": "client-1"}
    assert calls["cancel_all"] == {"account_id": "acct-1", "client_id": "client-1"}


def test_stop_loss_strategy_loads_with_aligned_regime_config(tmp_path):
    original_db = strategy_store.DB_PATH
    original_dir = strategy_registry.STRATEGIES_DIR
    try:
        strategy_store.DB_PATH = tmp_path / "trader_mcp.sqlite3"
        strategy_registry.STRATEGIES_DIR = tmp_path / "strategies"
        strategy_registry.STRATEGIES_DIR.mkdir()
        (strategy_registry.STRATEGIES_DIR / "grid_trader.py").write_text((Path(__file__).resolve().parents[1] / "strategies" / "grid_trader.py").read_text())
        (strategy_registry.STRATEGIES_DIR / "exposure_protector.py").write_text((Path(__file__).resolve().parents[1] / "strategies" / "exposure_protector.py").read_text())

        grid_defaults = strategy_registry.get_strategy_default_config("grid_trader")
        stop_defaults = strategy_registry.get_strategy_default_config("exposure_protector")

        assert grid_defaults["trade_sides"] == "both"
        assert grid_defaults["grid_step_pct"] == 0.012
        assert stop_defaults["trail_distance_pct"] == 0.03
        assert stop_defaults["rebalance_target_ratio"] == 0.5
        assert stop_defaults["min_rebalance_seconds"] == 180
        assert stop_defaults["min_price_move_pct"] == 0.005
    finally:
        strategy_store.DB_PATH = original_db
        strategy_registry.STRATEGIES_DIR = original_dir


def test_grid_supervision_reports_factual_capacity_not_handoff_commands():
    class FakeContext:
        account_id = "acct-1"
        market_symbol = "xrpusd"
        base_currency = "XRP"
        counter_currency = "USD"
        mode = "active"

    strategy = GridStrategy(FakeContext(), {})
    strategy.state.update({
        "last_price": 1.45,
        "base_available": 50.0,
        "counter_available": 38.7,
        "regimes": {"1h": {"trend": {"state": "bull"}}},
    })
    supervision = strategy._supervision()
    assert supervision["inventory_pressure"] == "base_heavy"
    assert supervision["capacity_available"] is False
    assert supervision["side_capacity"] == {"buy": True, "sell": True}

    strategy.state.update({
        "base_available": 88.0,
        "counter_available": 4.0,
    })
    supervision = strategy._supervision()
    assert supervision["inventory_pressure"] == "base_side_depleted"
    assert supervision["side_capacity"] == {"buy": True, "sell": False}


def test_trend_and_protector_supervision_reports_facts_only():
    class FakeContext:
        account_id = "acct-1"
        market_symbol = "xrpusd"
        base_currency = "XRP"
        counter_currency = "USD"
        mode = "active"

    trend = TrendStrategy(FakeContext(), {})
    trend.state.update({"last_price": 1.45, "last_strength": 0.42, "last_signal": "up", "base_available": 20.0, "counter_available": 20.0})
    trend_supervision = trend._supervision()
    assert trend_supervision["trend_strength"] == 0.42
    assert trend_supervision["signal"] == "up"
    assert "switch_readiness" not in trend_supervision
    assert "desired_companion" not in trend_supervision

    protector = ExposureStrategy(FakeContext(), {})
    protector.state.update({"last_price": 1.45, "base_available": 40.0, "counter_available": 10.0})
    protector_supervision = protector._supervision()
    assert protector_supervision["rebalance_needed"] is True
    assert "switch_readiness" not in protector_supervision
    assert "desired_companion" not in protector_supervision


def test_exposure_protector_holds_inside_hysteresis_band(monkeypatch):
    class FakeContext:
        account_id = "acct-1"
        market_symbol = "xrpusd"
        base_currency = "XRP"
        counter_currency = "USD"
        mode = "active"

        def __init__(self):
            self.placed_orders = []

        def get_account_info(self):
            return {"balances": [{"asset_code": "XRP", "available": 9.2}, {"asset_code": "USD", "available": 10.0}]}

        def get_price(self, market):
            return {"price": 1.0}

        def get_fee_rates(self, market):
            return {"maker": 0.0, "taker": 0.004}

        def place_order(self, **kwargs):
            self.placed_orders.append(kwargs)
            return {"status": "ok", "id": f"oid-{len(self.placed_orders)}"}

    ctx = FakeContext()
    strategy = ExposureStrategy(ctx, {"rebalance_target_ratio": 0.5, "rebalance_step_ratio": 0.15, "balance_tolerance": 0.05, "cooldown_ticks": 0, "min_rebalance_seconds": 0, "trail_distance_pct": 0.03})
    strategy.state["last_rebalance_side"] = "sell"
    strategy.state["last_order_at"] = 0
    monkeypatch.setattr(strategy, "_refresh_regimes", lambda: None)

    result = strategy.on_tick({})

    assert result["action"] == "hold"
    assert result["reason"] == "within rebalance hysteresis"
    assert ctx.placed_orders == []


def test_grid_apply_policy_keeps_explicit_grid_levels():
    class FakeContext:
        account_id = "acct-1"
        market_symbol = "xrpusd"
        base_currency = "XRP"
        counter_currency = "USD"
        mode = "active"

    strategy = GridStrategy(FakeContext(), {"grid_levels": 5, "policy": {"risk_posture": "normal"}})
    strategy.apply_policy()

    assert strategy.config["grid_levels"] == 5
    assert strategy.state["policy_derived"]["grid_levels"] == 5


def test_grid_skips_rebuild_when_balance_refresh_fails(monkeypatch):
    class FakeContext:
        base_currency = "XRP"
        counter_currency = "USD"
        market_symbol = "xrpusd"
        minimum_order_value = 10.0
        mode = "active"

        def __init__(self):
            self.cancelled_all = 0
            self.placed_orders = []

        def get_fee_rates(self, market):
            return {"maker": 0.0, "taker": 0.004}

        def get_account_info(self):
            raise RuntimeError("Bitstamp auth breaker active, retry later")

        def cancel_all_orders(self):
            self.cancelled_all += 1
            return {"ok": True}

        def suggest_order_amount(self, **kwargs):
            return 10.0

        def place_order(self, **kwargs):
            self.placed_orders.append(kwargs)
            return {"status": "ok", "id": f"oid-{len(self.placed_orders)}"}

    ctx = FakeContext()
    strategy = GridStrategy(ctx, {"grid_levels": 5, "order_call_delay_ms": 0, "enable_trend_guard": False, "fee_rate": 0.004})
    strategy.state["center_price"] = 1.4397
    strategy.state["seeded"] = True
    strategy.state["orders"] = [{"side": "buy", "price": 1.43, "amount": 10.0, "id": "o1"}]
    strategy.state["order_ids"] = ["o1"]

    monkeypatch.setattr(strategy, "_sync_open_orders_state", lambda: [{"side": "buy", "price": 1.43, "amount": 10.0, "id": "o1"}])
    monkeypatch.setattr(strategy, "_price", lambda: 1.4397)
    monkeypatch.setattr(strategy, "_refresh_regimes", lambda: None)

    result = strategy.on_tick({})

    assert result["action"] == "hold"
    assert result["reason"] == "balance refresh unavailable"
    assert ctx.cancelled_all == 0
    assert ctx.placed_orders == []


def test_grid_missing_order_triggers_full_rebuild(monkeypatch):
    class FakeContext:
        base_currency = "XRP"
        counter_currency = "USD"
        market_symbol = "xrpusd"
        minimum_order_value = 10.0
        mode = "active"

        def __init__(self):
            self.cancelled_all = 0
            self.placed_orders = []

        def get_fee_rates(self, market):
            return {"maker": 0.0, "taker": 0.004}

        def get_account_info(self):
            return {
                "balances": [
                    {"asset_code": "USD", "available": 13.55},
                    {"asset_code": "XRP", "available": 22.0103},
                ]
            }

        def suggest_order_amount(
            self,
            *,
            side,
            price,
            levels,
            min_notional,
            fee_rate,
            max_notional_per_order=0.0,
            dust_collect=False,
            order_size=0.0,
            safety=0.995,
        ):
            if side == "buy":
                quote_available = 13.55
                spendable_quote = quote_available * safety
                quote_cap = min(spendable_quote, max_notional_per_order) if max_notional_per_order > 0 else spendable_quote
                if quote_cap < min_notional * (1 + fee_rate):
                    return 0.0
                return quote_cap / (price * (1 + fee_rate))
            return 0.0

        def cancel_all_orders(self):
            self.cancelled_all += 1
            return {"ok": True}

        def place_order(self, **kwargs):
            self.placed_orders.append(kwargs)
            return {"status": "ok", "id": f"oid-{len(self.placed_orders)}"}

    ctx = FakeContext()
    strategy = GridStrategy(
        ctx,
        {
            "grid_levels": 2,
            "grid_step_pct": 0.0062,
            "grid_step_min_pct": 0.0033,
            "grid_step_max_pct": 0.012,
            "max_notional_per_order": 12,
            "order_call_delay_ms": 0,
            "trade_sides": "both",
            "debug_orders": True,
            "dust_collect": True,
            "enable_trend_guard": False,
            "fee_rate": 0.004,
        },
    )
    strategy.state["center_price"] = 1.3285
    strategy.state["seeded"] = True
    strategy.state["base_available"] = 22.0103
    strategy.state["counter_available"] = 13.55
    strategy.state["orders"] = [
        {"side": "buy", "price": 1.3243993, "amount": 7.63, "id": "existing-buy"},
        {"side": "sell", "price": 1.3326007, "amount": 9.0, "id": "sell-1"},
        {"side": "sell", "price": 1.3367011, "amount": 9.0, "id": "sell-2"},
    ]
    strategy.state["order_ids"] = ["existing-buy", "sell-1", "sell-2"]

    def fake_sync_open_orders_state():
        live = [{"side": "sell", "price": 1.3326007, "amount": 9.0, "id": "sell-1"}]
        strategy.state["orders"] = live
        strategy.state["order_ids"] = ["sell-1"]
        strategy.state["open_order_count"] = 1
        return live

    monkeypatch.setattr(strategy, "_sync_open_orders_state", fake_sync_open_orders_state)
    monkeypatch.setattr(strategy, "_price", lambda: 1.3285)
    monkeypatch.setattr(strategy, "_refresh_regimes", lambda: None)
    monkeypatch.setattr(strategy, "_grid_refresh_paused", lambda: False)
    monkeypatch.setattr(strategy, "_recenter_threshold_pct", lambda: 0.5)

    result = strategy.on_tick({})

    assert result["action"] in {"seed", "reseed"}
    assert ctx.cancelled_all == 1
    assert len(ctx.placed_orders) > 0
    assert strategy.state["last_action"] == "reseeded"


def test_grid_side_imbalance_triggers_full_rebuild(monkeypatch):
    class FakeContext:
        base_currency = "XRP"
        counter_currency = "USD"
        market_symbol = "xrpusd"
        minimum_order_value = 10.0
        mode = "active"

        def __init__(self):
            self.cancelled_all = 0
            self.placed_orders = []

        def get_fee_rates(self, market):
            return {"maker": 0.0, "taker": 0.004}

        def get_account_info(self):
            return {"balances": [{"asset_code": "USD", "available": 41.29}, {"asset_code": "XRP", "available": 9.98954}]}

        def cancel_all_orders(self):
            self.cancelled_all += 1
            return {"ok": True}

        def suggest_order_amount(self, **kwargs):
            return 10.0

        def place_order(self, **kwargs):
            self.placed_orders.append(kwargs)
            return {"status": "ok", "id": f"oid-{len(self.placed_orders)}"}

    ctx = FakeContext()
    strategy = GridStrategy(ctx, {"grid_levels": 2, "order_call_delay_ms": 0, "enable_trend_guard": False, "fee_rate": 0.004})
    strategy.state["center_price"] = 1.3907
    strategy.state["seeded"] = True
    strategy.state["orders"] = [{"side": "buy", "price": 1.3800, "amount": 10.0, "id": "o1"} for _ in range(5)]
    strategy.state["order_ids"] = [f"o{i}" for i in range(5)]

    def fake_sync_open_orders_state():
        live = [{"side": "buy", "price": 1.3800, "amount": 10.0, "id": f"o{i}"} for i in range(5)]
        strategy.state["orders"] = live
        strategy.state["order_ids"] = [f"o{i}" for i in range(5)]
        strategy.state["open_order_count"] = 5
        return live

    monkeypatch.setattr(strategy, "_sync_open_orders_state", fake_sync_open_orders_state)
    monkeypatch.setattr(strategy, "_refresh_balance_snapshot", lambda: True)
    monkeypatch.setattr(strategy, "_price", lambda: 1.3915)
    monkeypatch.setattr(strategy, "_refresh_regimes", lambda: None)
    monkeypatch.setattr(strategy, "_grid_refresh_paused", lambda: False)
    monkeypatch.setattr(strategy, "_recenter_threshold_pct", lambda: 0.5)

    result = strategy.on_tick({})

    assert result["action"] in {"seed", "reseed"}
    assert ctx.cancelled_all == 1
    assert len(ctx.placed_orders) > 0


def test_grid_recenters_exactly_on_live_price():
    class FakeContext:
        base_currency = "XRP"
        counter_currency = "USD"
        market_symbol = "xrpusd"
        minimum_order_value = 10.0
        mode = "active"

        def cancel_all_orders(self):
            return {"ok": True}

        def get_fee_rates(self, market):
            return {"maker": 0.0, "taker": 0.0}

        def suggest_order_amount(self, **kwargs):
            return 0.1

        def place_order(self, **kwargs):
            return {"status": "ok", "id": "oid-1"}

    strategy = GridStrategy(FakeContext(), {})
    strategy.state["center_price"] = 100.0

    strategy._recenter_and_rebuild_from_price(160.0, "test recenter")

    assert strategy.state["center_price"] == 160.0


def test_grid_stop_cancels_all_open_orders():
    class FakeContext:
        base_currency = "XRP"
        counter_currency = "USD"
        market_symbol = "xrpusd"
        minimum_order_value = 10.0
        mode = "active"

        def __init__(self):
            self.cancelled = False

        def cancel_all_orders(self):
            self.cancelled = True
            return {"ok": True}

        def get_fee_rates(self, market):
            return {"maker": 0.0, "taker": 0.0}

    strategy = GridStrategy(FakeContext(), {})
    strategy.state["orders"] = [{"id": "o1"}]
    strategy.state["order_ids"] = ["o1"]
    strategy.state["open_order_count"] = 1

    strategy.on_stop()

    assert strategy.context.cancelled is True
    assert strategy.state["open_order_count"] == 0
    assert strategy.state["last_action"] == "stopped"


def test_base_strategy_report_uses_context_snapshot():
    class FakeContext:
        id = "s-1"
        account_id = "acct-1"
        market_symbol = "xrpusd"
        base_currency = "XRP"
        counter_currency = "USD"
        mode = "active"

        def get_strategy_snapshot(self):
            return {
                "identity": {"strategy_id": "s-1", "strategy_name": "Demo", "account_id": "acct-1", "market": "xrpusd", "base_currency": "XRP", "quote_currency": "USD"},
                "control": {"enabled_state": "on", "mode": "active"},
                "position": {"balances": [{"asset_code": "XRP", "available": 1.0}]},
                "orders": {"open_orders": [{"id": "o1"}]},
                "execution": {"execution_quality": "good"},
            }

    class DemoStrategy(BaseStrategy):
        LABEL = "Demo"

    report = DemoStrategy(FakeContext(), {}).report()
    assert report["identity"]["strategy_id"] == "s-1"
    assert report["control"]["mode"] == "active"
    assert report["position"]["open_orders"][0]["id"] == "o1"


def test_trend_follower_uses_policy_and_reports_fit():
    class FakeContext:
        id = "s-2"
        account_id = "acct-2"
        client_id = "cid-2"
        mode = "active"
        market_symbol = "xrpusd"
        base_currency = "XRP"
        counter_currency = "USD"

        def get_price(self, symbol):
            return {"price": 1.2}

        def get_regime(self, symbol, timeframe="1h"):
            return {"trend": {"state": "bull", "strength": 0.9}}

        def place_order(self, **kwargs):
            return {"ok": True, "order": kwargs}

        def get_strategy_snapshot(self):
            return {"identity": {}, "control": {}, "position": {}, "orders": {}, "execution": {}}

    strat = TrendStrategy(FakeContext(), {"order_size": 1.5})
    strat.apply_policy()
    report = strat.report()
    assert report["fit"]["risk_profile"] == "growth"
    assert strat.state["policy_derived"]["order_size"] > 0


def test_trend_follower_buys_from_bull_regime_without_explicit_strength():
    class FakeContext:
        id = "s-bull"
        account_id = "acct-1"
        client_id = "cid-1"
        mode = "active"
        market_symbol = "xrpusd"
        base_currency = "XRP"
        counter_currency = "USD"

        def __init__(self):
            self.orders = []

        def get_price(self, symbol):
            return {"price": 1.2}

        def get_regime(self, symbol, timeframe="1h"):
            return {
                "trend": {"state": "bull", "ema_fast": 1.21, "ema_slow": 1.18},
                "momentum": {"state": "bull", "rsi": 64, "macd_histogram": 0.002},
            }

        def place_order(self, **kwargs):
            self.orders.append(kwargs)
            return {"ok": True, "order": kwargs}

        def get_account_info(self):
            return {"balances": [{"asset_code": "USD", "available": 1000}, {"asset_code": "XRP", "available": 0}]}

        minimum_order_value = 10.0

        def suggest_order_amount(self, **kwargs):
            return 10.0

        def get_strategy_snapshot(self):
            return {"identity": {}, "control": {}, "position": {}, "orders": {}, "execution": {}}

    ctx = FakeContext()
    strat = TrendStrategy(ctx, {"order_size": 2.0, "trend_timeframe": "15m"})
    result = strat.on_tick({})
    assert result["action"] == "buy"
    assert ctx.orders[-1]["side"] == "buy"
    assert ctx.orders[-1]["amount"] == 10.0
    assert strat.state["last_action"] == "buy_trend"
    assert strat.state["last_strength"] >= 0.65


def test_trend_follower_sells_from_bear_regime_without_explicit_strength():
    class FakeContext:
        id = "s-bear"
        account_id = "acct-1"
        client_id = "cid-1"
        mode = "active"
        market_symbol = "xrpusd"
        base_currency = "XRP"
        counter_currency = "USD"

        def __init__(self):
            self.orders = []

        def get_price(self, symbol):
            return {"price": 1.2}

        def get_regime(self, symbol, timeframe="1h"):
            return {
                "trend": {"state": "bear", "ema_fast": 1.17, "ema_slow": 1.2},
                "momentum": {"state": "bear", "rsi": 36, "macd_histogram": -0.002},
            }

        def place_order(self, **kwargs):
            self.orders.append(kwargs)
            return {"ok": True, "order": kwargs}

        def get_account_info(self):
            return {"balances": [{"asset_code": "USD", "available": 1000}, {"asset_code": "XRP", "available": 10}]}

        minimum_order_value = 10.0

        def suggest_order_amount(self, **kwargs):
            return 6.0

        def get_strategy_snapshot(self):
            return {"identity": {}, "control": {}, "position": {}, "orders": {}, "execution": {}}

    ctx = FakeContext()
    strat = TrendStrategy(ctx, {"order_size": 2.0, "trend_timeframe": "15m"})
    result = strat.on_tick({})
    assert result["action"] == "sell"
    assert ctx.orders[-1]["side"] == "sell"
    assert ctx.orders[-1]["amount"] == 6.0
    assert strat.state["last_action"] == "sell_trend"
    assert strat.state["last_strength"] >= 0.65


def test_trend_follower_policy_does_not_override_explicit_order_size():
    class FakeContext:
        id = "s-explicit"
        account_id = "acct-1"
        client_id = "cid-1"
        mode = "active"
        market_symbol = "xrpusd"
        base_currency = "XRP"
        counter_currency = "USD"

        def get_price(self, symbol):
            return {"price": 1.2}

        def get_regime(self, symbol, timeframe="1h"):
            return {"trend": {"state": "bull", "strength": 0.9}}

        def get_strategy_snapshot(self):
            return {"identity": {}, "control": {}, "position": {}, "orders": {}, "execution": {}}

    strat = TrendStrategy(FakeContext(), {"order_size": 10.5})
    strat.apply_policy()
    assert strat.config["order_size"] == 10.5
    assert strat.state["policy_derived"]["order_size"] == 10.5


def test_trend_follower_passes_live_fee_rate_into_sizing_helper():
    class FakeContext:
        id = "s-fee"
        account_id = "acct-1"
        client_id = "cid-1"
        mode = "active"
        market_symbol = "xrpusd"
        base_currency = "XRP"
        counter_currency = "USD"
        minimum_order_value = 10.0

        def __init__(self):
            self.fee_calls = []
            self.suggest_calls = []

        def get_price(self, symbol):
            return {"price": 1.2}

        def get_regime(self, symbol, timeframe="1h"):
            return {"trend": {"state": "bull", "strength": 0.9}}

        def get_fee_rates(self, market_symbol=None):
            self.fee_calls.append(market_symbol)
            return {"maker": 0.0025, "taker": 0.004}

        def suggest_order_amount(self, **kwargs):
            self.suggest_calls.append(kwargs)
            return 8.0

        def place_order(self, **kwargs):
            return {"ok": True, "order": kwargs}

        def get_account_info(self):
            return {"balances": [{"asset_code": "USD", "available": 1000}, {"asset_code": "XRP", "available": 0}]}

        def get_strategy_snapshot(self):
            return {"identity": {}, "control": {}, "position": {}, "orders": {}, "execution": {}}

    ctx = FakeContext()
    strat = TrendStrategy(ctx, {"order_size": 10.5, "trend_timeframe": "15m"})
    strat.on_tick({})
    assert ctx.fee_calls == ["xrpusd"]
    assert ctx.suggest_calls[-1]["fee_rate"] == 0.0025