Random days?

 

Hello, i'm new here and to mql5, I was wondering why is it some EA's can get extremely good results..   

IE   2020.1.1_2022.1.1, i  can turn $100.00 into $1,000,000.00 plus (everytick, open and real ticks)    but soon as i allow 2020.1.1_(now) it goes down.

Also is there a way top set up a script to test my EA on multiple date ranges automatically changing the start and end dates? 

And or even one to take the 10 ten results of the current backtest and rerun them on random date ranges ?  

Lastly is there a MQH database for adding custom indicators

Step on New Rails: Custom Indicators in MQL5
Step on New Rails: Custom Indicators in MQL5
  • www.mql5.com
I will not list all of the new possibilities and features of the new terminal and language. They are numerous, and some novelties are worth the discussion in a separate article. Also there is no code here, written with object-oriented programming, it is a too serous topic to be simply mentioned in a context as additional advantages for developers. In this article we will consider the indicators, their structure, drawing, types and their programming details, as compared to MQL4. I hope that this article will be useful both for beginners and experienced developers, maybe some of them will find something new.