I also face the same problem.
As a result, entry point on FSB & FST are often different.
FST often makes entry that does not exist on FSB. And FST skips some trades that exist on FSB.
I increased the minimum number of bars in the chart to 800, but still cannot get the same value.
Now I'm testing on 5min chart. Among all indicators I use, ADX is most tricky so far ("rise" & "fall" are often different).
If the indicators' calculation is exactly the same both in FSB & FST, it might come from the difference of data even it is from the same broker.
FSB is based on historical data, but FST is using live data. I don't know whether the brokers provide the data differently on purpose. But it is serious problem for us that the result of back-tester & that of EA are different.
If it is not accurate like mathematics, we will lose the reason to rely on back-testing & do real trading in theory.
Is there any method to avoid this? Or is it possible to import both historical data & live data to FST for double-checking and verify before sending order to MT4 (of course, there will be delay slightly to order in this case). But for me, I'll be very happy if I can have exactly the same result on FSB & FST.
If you pursue the speed, maybe it is good to use live data only. But if you pursue the accuracy, then I feel it is better to use both historical data & live data.
I'll be happy if FST has such "Accurate Mode" for the option.