Expert advisor

[Hilton Chitanda]

So when you test an expert advisor on historical data and it gives good results does that mean it is automatically profitable in real time trading 

[Roberto Jacobs]

Hilton Chitanda:
So when you test an expert advisor on historical data and it gives good results does that mean it is automatically profitable in real time trading 

No!

[Hilton Chitanda]

Roberto Jacobs #:

No!

Please explain 

[MAHA]

Hilton Chitanda #:
Please explain 

You can optimize an ea and choose the best result at end. 

Create a demo account in your broker, and leave the ea auto trading.

[Roberto Jacobs]

Hilton Chitanda #:
Please explain 

There are many reasons. You can read about it here, or search on Google.

https://www.mql5.com/en/search#!keyword=Testing%20EA%20in%20strategy%20tester%20&page=1

https://www.mql5.com/en/forum/150969

https://www.mql5.com/en/forum/154422

https://www.mql5.com/en/forum/279563

[Tobias Christian Witzigmann]

Roberto Jacobs #:

No!

Agree 100%. There is much more to do than just a simple backtest.

And I'm not even talking about all the technical stuff like wrong spread, bugs, bad data.... That's the first thing you need to get right. After that, you will most likely fall into the trap of over-optimization.

So no, a good backtest means nothing. Creating a good looking backtest is easy, anyone can do it. Creating a good strategy is much harder.

https://www.mql5.com/en/forum/427978/page2