This site offers good insight into spread history: https://www.oanda.com/us-en/trading/historical-spreads/

My usual procedure is the following:
- examine the trading rules for contradictions. (Example: close long when RSI crosses 90 upwards.)
- examine strategies with a too-good-to-be-true balance curve even further.
- test the strategy in MetaTrader. (now prefer MT5). If there is a too-big discrepancy, the strategy is questionable.
- demo or live trading with a minimal amount for three weeks. Acceptable performance is the most critical factor.

We never know which strategies will perform best in the market.
I have many cases when I create a simple strategy to test some behaviour, which performs amazingly well.

However, recently, I changed my approach. I prefer a pool of thousands of strategies per chosen market and revalidate them with Express Generator on newer data.

I understand that in EA Studio if I use the Dynamic Spread option then the balance line will be more realistic than without the Dynamic Spread option box checked.  However, when I leave the Dynamic Spread option box unchecked then the EA created by EA Studio has a similar balance line as to the balance line in FSBpro when I upload the same EA into FSBpro.  So in this case I understand that neither EA Studio or FSBpro balance lines are accurate.

Now here is where I get confused:  When I upload the EA that was created in EA Studio is uploaded into FSBpro I understand the balance line is not the most accurate it looks the same as the balance line in EA Studio when the Dynamic Spread box is unchecked.  If this is the case then when I create an EA using FSBpro how can I feel confident its balance line is accurate?  This is confusing to me!

If I understand you correctly the balance line in EA Studio when using Dynamic Spread is a more realistic than the balance line in FSBpro.

Thanks for being very responsive to resolving this issue and in answering all my questions quickly.

Alan,

The image of EA Studio above where the balance line shows big drawdown followed by a rally is with the Dynamic Spread turned off.  Is this the correct balance line with the Dynamic Spread turned off?

Also when I turn Dynamic Spread "on" and go to a different tab and then come back to Tools the Dynamic Spread check box is again unchecked.  It will not remain checked.  Because of this I cannot view the balance line with the Dynamic Spread enabled.  What am I doing wrong?

This execution difference causes different results.

Another difference is that EA Studio uses Dynamic Spread by default.
You can switch it off from Tools -> Settings. The option is called "Use dynamic spread".

Besides these differences, I think everything is fine in the latest versions.

FSB Pro exports its own experts that work correctly with its logic.
EA Studio exports other experts who resemble its logic.

Both programs work similarly but not in the absolutely same way.

We have the same count of trades, the same chart shape and a very similar performance (dough Dynamic spread is off)

EA Studio is more reliable in that case because it can use a Dynamic spread and shows a more realistic result.

Which is the more accurate, EA Studio or FSBpro.

EA Studio count of trades = 18
FSBpro executed orders  =  24

Note:  FSBpro did not update its version number when it was launched.  I had to install the latest version over it to get the latest version.

I'll examine it further.

Edit.

FSB Pro still does not set the Pip value correctly for the Premium Data feed. I'll fix it later today.

It will be automatically updated on the next start (however, it checks for updates once per 24 hours)

You can also download and install the new version over your current installation.

I'll release a fix on Sunday evening.

Thank you for the report!

EA Studio count of trades = 19
FSBpro executed orders  = 112