The same system, the same rules, the same strategy. But completely different results at different times. Have you ever thought: Could the reason for the system's failure be your code, not the time?
Although financial markets seem to be continuously open, they do not offer the same liquidity, player intensity, and volatility at every hour. Therefore, if you have not analyzed the profit-loss distribution of the system on an hourly basis, what you think is success may be just a coincidence.
Example:
Let's say a system has a 60% win rate based on the backtest result from a total of 1000 trades.
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