It is normal to have different readings, because it depends on data starting point. In FSB you might use 20k bars, but in trading it uses less, hence the difference. Important part is that the signals have to match.

Hi

Here is the template for clarifying of the error

Lg Pit

I don't get your problem, it is not logical. On Balance has 2 types of logic - 1. rises/falls; 2. changes direction. Therefore, if it is negative or positive does not matter, the readings are different but the shape of the indicator line on the chart is the same.

I tested it out, it works and opens trades.

Verschiedene Lesarten sind normal!

On Balance Volume is a sum of the volumes of all bars where the bearish bars volumes are with a negative sign.
Here the difference comes from the different count of bars used in FSB backtester, FSB trader and exported EA.
Unfortunately this indicator is near to useless and I don't recommend to be included in a strategies for live trading.

An eventual fix can be adding a "period" variable to the indicator in order to limit the number of bars used.