with MT4 the issue is clear by addressing iCustom(.... ) Bar 1 instead of the latest Bar 0 for example.
How would one get - previous - values when an MT 5 EA is using a code like, let's say
GlobalVariableGet("Indicator_EURUSD_5_CURR"); this code shows the latest value.
But the Bar  value etc. would be interesting.
The indicator draws, when running RT (not before) , one histogramm after the other.
if anyone has possible hints to this issue, thanks in advance