Variable values from Indicator are not the same as those in EA

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I have one indicator. There are three variables, which are important for drawing a line on a chart on every bar.

I wrote an EA, which calls indicator with iCustom function:

iCustom(NULL, 0, "Name of indicator",parameter1, parameter2,...,0,0)

iCustom(NULL, 0, "Name of indicator",parameter1, parameter2,...,1,0)

iCustom(NULL, 0, "Name of indicator",parameter1, parameter2,...,2,0)

for the 3 important variables.

I print them on every tick (shift 0 in iCustom).

So, indicator draws a line on every bar, EA prints variables on every thick.

When I put a mouse on the chart, I can see indicator's variables in data windows.

Question: Why are those variables not the same as those, printed on every tick (slitely difference)?

I compare printed values of ticks close to end of one bar and start of a new bar with those on indicator.