How to Get 90% out of backtesting

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I have seen people post 90% modeling. The best I get is 40%. How do I make it that it tests at 90%??
 
You need to assure you have sufficient History Data for your test. For a reference read, open MT4 help in upper menu bar or just press F1. In this Help Section , click on Tools at bottom of Content list and then click History Center.

History Data Download Routine
1. Open MT4 Options in the Tools menu.
2. Click Charts.
3. Set max bars in History and Charts to 999999999. (max 9s)
4. Close Options.
5. Open History Center in the Tools menu.
6. Double-Click M1 for desired currency pair.
7. Click Download
8. After download is complete, close History Center.
9. Close and re-start MT4.
 
I don't recommend to download that history, it's way far from reality, it makes me waste my time and loose some pips.
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