fisk/core/tests/trading/test_live.py

from decimal import Decimal as D
from unittest.mock import patch

from django.test import TestCase

from core.exchanges.convert import convert_trades
from core.models import RiskModel, Trade
from core.tests.helpers import ElasticMock, LiveBase
from core.trading import market, risk


class LiveTradingTestCase(ElasticMock, LiveBase, TestCase):
    def setUp(self):
        super(LiveTradingTestCase, self).setUp()
        self.trade = Trade.objects.create(
            user=self.user,
            account=self.account,
            symbol="EUR_USD",
            time_in_force="FOK",
            type="market",
            amount=10,
            direction="buy",
        )
        self.commission = 0.025
        self.risk_model = RiskModel.objects.create(
            user=self.user,
            name="Test Risk Model",
            max_loss_percent=4,
            max_risk_percent=2,
            max_open_trades=3,
            max_open_trades_per_symbol=2,
        )

    def test_account_functional(self):
        """
        Test that the account is functional.
        """
        balance = self.account.client.get_balance()
        # We need some money to place trades
        self.assertTrue(balance > 1000)

    def open_trade(self, trade=None):
        if trade:
            posted = trade.post()
        else:
            trade = self.trade
            posted = self.trade.post()
        # Check the opened trade
        self.assertEqual(posted["type"], "MARKET_ORDER")
        self.assertEqual(posted["symbol"], trade.symbol)
        self.assertEqual(posted["units"], str(trade.amount))
        self.assertEqual(posted["timeInForce"], "FOK")

        return posted

    def close_trade(self, trade=None):
        if trade:
            trade.refresh_from_db()
            closed = self.account.client.close_trade(trade.order_id)
        else:
            trade = self.trade
            # refresh the trade to get the trade id
            self.trade.refresh_from_db()
            closed = self.account.client.close_trade(self.trade.order_id)

        # Check the feedback from closing the trade
        self.assertEqual(closed["type"], "MARKET_ORDER")
        self.assertEqual(closed["symbol"], trade.symbol)
        self.assertEqual(closed["units"], str(0 - int(trade.amount)))
        self.assertEqual(closed["timeInForce"], "FOK")
        self.assertEqual(closed["reason"], "TRADE_CLOSE")

        return closed

    def test_place_close_trade(self):
        """
        Test placing a trade.
        """
        self.open_trade()
        self.close_trade()

    def test_get_all_open_trades(self):
        """
        Test getting all open trades.
        """

        self.open_trade()

        trades = self.account.client.get_all_open_trades()
        self.trade.refresh_from_db()
        found = False
        for trade in trades:
            if trade["id"] == self.trade.order_id:
                self.assertEqual(trade["symbol"], "EUR_USD")
                self.assertEqual(trade["currentUnits"], "10")
                self.assertEqual(trade["initialUnits"], "10")
                self.assertEqual(trade["state"], "OPEN")
                found = True
                break
        self.close_trade()

        if not found:
            self.fail("Could not find the trade in the list of open trades")

    def create_complex_trade(self, direction, amount, symbol, tp_percent, sl_percent):
        eur_usd_price = market.get_price(self.account, direction, symbol)
        trade_tp = market.get_tp(direction, tp_percent, eur_usd_price)
        trade_sl = market.get_sl(direction, sl_percent, eur_usd_price)
        # trade_tsl = market.get_sl("buy", 1, eur_usd_price, return_var=True)
        # # TP 1% profit
        # trade_tp = eur_usd_price * D(1.01)
        # # SL 2% loss
        # trade_sl = eur_usd_price * D(0.98)
        # # TSL 1% loss
        # trade_tsl = eur_usd_price * D(0.99)

        trade_precision, display_precision = market.get_precision(self.account, symbol)
        # Round everything to the display precision

        trade_tp = round(trade_tp, display_precision)
        trade_sl = round(trade_sl, display_precision)
        # trade_tsl = round(trade_tsl, display_precision)

        complex_trade = Trade.objects.create(
            user=self.user,
            account=self.account,
            symbol=symbol,
            time_in_force="FOK",
            type="market",
            amount=amount,
            direction=direction,
            take_profit=trade_tp,
            stop_loss=trade_sl,
            # trailing_stop_loss=trade_tsl,
        )
        return complex_trade

    @patch("core.exchanges.oanda.OANDAExchange.get_balance", return_value=100000)
    def test_check_risk_max_risk_pass(self, mock_balance):
        # SL of 19% on a 10000 trade on a 100000 account is 1.8 loss
        # Should be comfortably under 2% risk
        trade = self.create_complex_trade("buy", 10000, "EUR_USD", 1, 18)
        allowed = risk.check_risk(self.risk_model, self.account, trade)
        self.assertTrue(allowed["allowed"])

    @patch("core.exchanges.oanda.OANDAExchange.get_balance", return_value=100000)
    def test_check_risk_max_risk_fail(self, mock_balance):
        # SL of 21% on a 10000 trade on a 100000 account is 2.2 loss
        # Should be over 2% risk
        trade = self.create_complex_trade("buy", 10000, "EUR_USD", 1, 22)
        allowed = risk.check_risk(self.risk_model, self.account, trade)
        self.assertFalse(allowed["allowed"])
        self.assertEqual(allowed["reason"], "Maximum risk exceeded.")

    @patch("core.exchanges.oanda.OANDAExchange.get_balance", return_value=94000)
    # We have lost 6% of our account
    def test_check_risk_max_loss_fail(self, mock_balance):
        # Doesn't matter, shouldn't get as far as the trade
        trade = self.create_complex_trade("buy", 1, "EUR_USD", 1, 1)
        allowed = risk.check_risk(self.risk_model, self.account, trade)
        self.assertFalse(allowed["allowed"])
        self.assertEqual(allowed["reason"], "Maximum loss exceeded.")

    @patch("core.exchanges.oanda.OANDAExchange.get_balance", return_value=100000)
    def test_check_risk_max_open_trades_fail(self, mock_balance):
        # The maximum open trades is 3. Let's open 2 trades
        # This would not be allowed by the risk model but we're doing it
        # manually
        # Don't be confused by the next test. The max open trades check
        # fails before the symbol one is run, but yes, they would both
        # fail.
        trade1 = self.create_complex_trade("buy", 1, "EUR_USD", 1, 1)
        self.open_trade(trade1)

        trade2 = self.create_complex_trade("buy", 1, "EUR_USD", 1, 1)
        self.open_trade(trade2)

        trade3 = self.create_complex_trade("buy", 1, "EUR_USD", 1, 1)

        allowed = risk.check_risk(self.risk_model, self.account, trade3)
        self.assertFalse(allowed["allowed"])
        self.assertEqual(allowed["reason"], "Maximum open trades exceeded.")

        self.close_trade(trade1)
        self.close_trade(trade2)

    @patch("core.exchanges.oanda.OANDAExchange.get_balance", return_value=100000)
    def test_check_risk_max_open_trades_per_symbol_fail(self, mock_balance):
        trade1 = self.create_complex_trade("buy", 1, "EUR_USD", 1, 1)
        self.open_trade(trade1)

        trade2 = self.create_complex_trade("buy", 1, "EUR_USD", 1, 1)

        allowed = risk.check_risk(self.risk_model, self.account, trade2)
        self.assertFalse(allowed["allowed"])
        self.assertEqual(allowed["reason"], "Maximum open trades per symbol exceeded.")

        self.close_trade(trade1)

    def test_convert_trades(self):
        """
        Test converting open trades response to Trade-like format.
        """
        complex_trade = self.create_complex_trade("buy", 10, "EUR_USD", 1, 2)

        self.open_trade(complex_trade)

        # Get and annotate the trades
        trades = self.account.client.get_all_open_trades()
        trades_converted = convert_trades(trades)

        # Check the converted trades
        self.assertEqual(len(trades_converted), 1)
        expected_tp_percent = D(1 - self.commission)
        expected_sl_percent = D(2 - self.commission)
        actual_tp_percent = trades_converted[0]["take_profit_percent"]
        actual_sl_percent = trades_converted[0]["stop_loss_percent"]

        tp_percent_difference = abs(expected_tp_percent - actual_tp_percent)
        sl_percent_difference = abs(expected_sl_percent - actual_sl_percent)
        max_difference = D(0.08)  # depends on market conditions

        self.assertLess(tp_percent_difference, max_difference)
        self.assertLess(sl_percent_difference, max_difference)

        # Convert the trades to USD
        trades_usd = market.convert_trades_to_usd(self.account, trades_converted)

        # Convert the trade to USD ourselves
        trade_in_usd = D(trades_usd[0]["amount"]) * D(trades_usd[0]["current_price"])

        # It will never be perfect, but let's check it's at least close
        trade_usd_conversion_difference = (
            trades_usd[0]["trade_amount_usd"] - trade_in_usd
        )
        self.assertLess(trade_usd_conversion_difference, D(0.01))

        # Check the converted TP and SL values
        trade_usd_tp_difference = trades_usd[0]["take_profit_usd"] - D(0.1)
        trade_usd_sl_difference = trades_usd[0]["stop_loss_usd"] - D(0.2)

        self.assertLess(trade_usd_tp_difference, D(0.01))
        self.assertLess(trade_usd_sl_difference, D(0.02))

        self.close_trade(complex_trade)