Episode Details

This story was originally published on HackerNoon at: https://hackernoon.com/your-backtest-left-out-the-two-costs-that-kill-it.
Learn why profitable backtests fail in live trading and how realistic slippage and fee modeling can reveal whether your trading strategy truly has an edge.
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A trading bot that looked spectacular in backtests lost money live because slippage and trading fees were ignored. Small execution costs compound quickly in high-frequency strategies, often wiping out apparent profits. By modeling realistic fees and slippage before deployment, traders can separate genuine edges from backtesting illusions and avoid expensive live-market surprises.