What is the best way to make back test 99%

What is the best way to make back test 99%
use MT5

And what do I do if my broker does not support MT5 but only MT4

A-S:

And what do I do if my broker does not support MT5 but only MT4

Search for e.g. Tickstory light.

A-S:

And what do I do if my broker does not support MT5 but only MT4

search for  better broker