What is your advice on how long to use for back testing and forward testing?

Hello everyone,

I need some help here, I’m considering using a 1H time frame to trade, and with my EA , i want to backtest and forwardtest appropriately.

I am familiar with the procedures and all, but what do you recommend should be the time period i backtest and forwardtest with?

Should I backtest 12 months and forwardtest 3 months? Or should I backtest 6 months of data and just forwardtest 2 months?

I’d like to find the optimum settings, just that I’m not too sure how long I should backtest and forwardtest (around 25% of backtest range I heard) to find those stats.

Any recommendations from you more experienced people?