6a20cc174f
Unit tests (13 passing): - Kline fetching and processing - Price drop condition triggers buy - Stop loss and take profit risk management - Multiple positions (buy again after sell) - Max candles limit - Stop interruption handling Frontend: - SignalChart now shows price movement even before signals - Shows candle count even with no signals - Chart displays buy/sell markers when signals exist - Canvas-based chart with gradient fill Backend: - Simulation stores klines for chart display - Returns klines in API response - Simplified simulation run (no periodic saving)