Very Slow BackTest

1. EAs : Don't do per tick that you can do per bar, or on open.
   If you are waiting for a level, don't reevaluate, wait until price reaches it (or a new bar starts and you recalculate.)
   If you are waiting for an order to open or close, only look when OrdersTotal (or MT5 equivalent) has changed.
             How to get backtesting faster ? - MT4 - MQL4 programming forum

2. Indicators: Code it properly so it only recomputes bar zero (after the initial run.)
             How to do your lookbacks correctly.
   Or, reduce Tools → Options (control+O) → Charts → Max bars in chart to something reasonable (like 1K.)

You have no idea; you are just guessing. Without seeing the code we are just guessing.

Hi William, I´m facing same problem, but the reason looks to be in other place:

I have same EA which is coded to work with several assest. It´s tester works great with EUR/GBP and any other Forex, but takes hours with brazilian assests WIN$N and WDO@N. 

I tested on different computers, created custom symbol and tried other continous series (@). Nevertheless, it take hours to run backteast...

Is it possible to have an incompatibility with brazilian continuous series? Cause I also tried continuous US Futures (MEZ@ and MNN@) and it works like a charm.

Thanks for your help!

Of course it's possible. Most EA are not coded to work equally on Forex and Futures (or Stocks).

Fix your code.

Thanks for your reply Alain!

It is important to mention that I already use this EA to trade these brazilian stocks (WIN/WDO) and I didn´t get any visual problem over the last months. My EA performs very well indeed, with sharp and fast trades. This issues is evident only when I run Tester.

However, doesn´t matter what I do, I don´t find the cause and my poor knowledge tells me every moment to ask for help...

Therefore, I kindly ask you if you have any hint I should start from to fix this issue. If so, I do appreciate for your help!