Backtesting – The process of running a trading robot on historical price data to simulate performance. Both MT5 and cTrader provide built-in backtesting tools. In cTrader, optimization is effectively “a series of backtests” where each backtest (pass) uses a different set of parameter values. In MT5, the Strategy Tester walks through accumulated quotes and makes virtual trades, allowing evaluation of how an Expert Advisor (EA) would have traded in the past.

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