There is no single recommended slippage value for all trading strategies or brokers.
The optimal slippage setting depends on your broker, the instruments you trade, market volatility, and your tolerance for execution differences. Increasing the slippage value may improve the likelihood of trades being copied successfully, but it can also increase execution risk.
As a general guideline:
We recommend starting with the default value and increasing it only if necessary to achieve reliable trade execution while maintaining an acceptable level of risk.