Erratic Behavior

[[Deleted]]

Why a Expert Strategy has behavior in Strategy Tester and another in practice? In my account demo, I have done testing (past date period), with a result, then to apply in the account demo, not behaves just like. Thk.

[[Deleted]]

Historical data (for back testing) cannot actually contain every millisecond price variation.

So demo account will behave different from back-test

And...

Live account will behave different from demo account - even of the same broker...

As a minimum you must optimize on on the historical demo data from the broker (not Download history, which would be MT data)

Then before live trade, re-optimize on back data from the live account (3 months+).

There will still be differences, how much depends on how vulnerable your EA is to data spikes, spread changes, trade delays, etc...

FWIW

-BB-

[[Deleted]]

I understand then that a good practice is since the real account, do the same Test that before I made in the account demo? Thk.

[[Deleted]]

".. the real account, do the same Test .."

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Yes essential to re-optimize on at least three months of data from the live account, either from an account that has been running for that time or take the data off the chart

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Then...

Still be prepared for differences in running the EA on live trading...

Good Luck

-BB-