How far Should one backtest

 

How far should one backtest a EA to determine potential profitability. 1 year? 2-5? more?

I understand the overall nature of the market changes from year to year, so an EA that works now might not work in the future, or might not work in the past.

What are you guys' thoughts?

 
eight10:

How far should one backtest a EA to determine potential profitability. 1 year? 2-5? more?

I understand the overall nature of the market changes from year to year, so an EA that works now might not work in the future, or might not work in the past.

What are you guys' thoughts?

Depends on your time frame. Is your strat trading minute to minute moves, hour to hour moves, month to month moves?