I'm looking forward for the function whereby the Bar calculation could automatically done by FSB and export to MT4, however, do have the option to over-ride this automated input and allow manual input in any case may be needed.

I'm totally confuse with the bars calculation and I'm not sure how many out there knows how to calculate how many bars needed for their strategy to work.

If you are confused, you are on the right way. Be sure 99% of the traders have no idea what they are doing.

You can, bunt it is not recommended. The more bars you use, the more memory your expert will consume. Eventually the expert may become slower, to miss some ticks and to execute a deal with slippage.

The expert will not trade in such a case. It will report a "Not enough bars" error.

I'm not aware of a tool that calculates an indicator precision as a function of the data series length. However, I intend to make such tool and to include it in FSB and the exported EAs.

For now you can start from 500 or 1000 bars and to compare the values shown in the expert with the values in the FSB chart. If the values differ increase the required bars. Do that until the indicator values stop changing and use the shorter number of bars.

So can I then put the bars as high as I can?  For Example, in the 1 min MT4 chart, when I put the cursor as Footon mentioned previously, I can find out how many bars and in my chart, it has 45146 bars.  Do I or can I put 45000 in the Maximum Data Bars input section?

Is there any harm in putting more Bars than what the strategy require?  Eg strategy needs only 1000, and under the EA input for Maximum Data Bars, I put 10,000?  What would happen?  Would my strategy still work?

Is there any harm in putting more Bars than what the MT4 chart has? Eg the MT4 1 min chart has 45146 Bars and I put 50,000 Bars in the EA input for Maximum Data Bars?  What would happen?  Would my strategy still work?

Since I don't know how to calculate the bars needed for each strategies (and I have so many strategies, too much for me to calculate them one by one), can I then put the cursor on the chart and input the 45145 bars into the EA input section?

With the fix, 1000 bars should be enough to make the values equal.

In order to eliminate values discrepancies I plan to make a tool that will calculate the exact number of required bars for both the bridge and the exported EAs.

On 2000 bars crossover values match, but the first MA is lost even with 5000 bars.

It shouldn't need so many bars, something is not right.

When you point the cursor on currency pair tab in mt, what does it read? Like I did in my pic.

I used this occasion to a couple of other experiments:

MA crossover - indicator parameters started to "converge" somewhere over 800 bars. At 2000 and 5000 bars were indicator parameters identical. But why it was necessary to set so many bars?

MA - values of this indicator are always volatile, regardless if I use 300, 800, 2000 or 5000 bars.

I re-open this issue, because ma indicators in my strategy have different (and changing!) values in Trader part compared to the Builder. For both parts I use identical data (Ctrl+S from the chart in MT4).

I tried to set different "Recommended chart bars" values in Trader mode/Auto Trader/Trade Settings (300, 400, 600, 1000 and 2000).
I compared values of ma and ma crossover indicators at the identical historical candle in Trader and Builder (e.g. 12th May, 16:50 candle).
I expected that from some "Recommended chart bars" level, indicator readings will start to be identical and will not change with increasing number of bars.
However I was surprised to see that with every increasing number of bars, values of ma and ma crossover indicators were different in Trader (even with 2000 bars)!

Can you explain the reason for this strange behaviour? What is a theoretical minimum number of bars needed for this strategy in order to run the Trader correctly?

Did you try to change the position size conditions '' i.e add and close make it nothing '' and then compare the results