Backtest replay with sample sessions. Place orders and watch them fill the way an exchange would.
Backtest replay rolls the chart back to a past moment and lets you trade forward without seeing the next candle. Anyone reads a chart well when the outcome is already known; hide the next bar and your real judgment shows.
Order handling follows exchange behavior. Leverage, limit orders, TP/SL and liquidation on insufficient margin are all reproduced, so a strategy is tested under live-like conditions. Sessions can be saved and picked up later.