Hunt down traders and sell EA with backtest (Don't get trapped)
Many programmers do this. Tries to deceive you with an unreal backtest. A backtest that can be done even for CP. Same results with both MT4 and MT5. Dear Andrey and CP are perfect. Do not go on other adventures. If you are fooled by such things, you will be disappointed.
Don't get excited.
If EA is optimized to max spread then optimization is required for each broker separately. Even small differences in the spread show a big difference in the result. In such a case, there is no universal set that would apply to all brokers.