Weird indicator vs Expert advisor

I use an indicator that looks and works fine on all past data but it has weird calculations when it comes to continually running. It starts drawing lines in random places. (I hope this is making sense)
What I want to know is, when I program this into my EA, will the EA pull the data from this indicator "like new" as if I put the indicator on the chart for the first time, every time?

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If I have the indicator running for an hour it may return 1,5 as it's value, but if I remove the indicator and put it back on imidietly, then it may return 1,45.
When I program this indicator with iCustom, and have the EA run for hours, will it return 1,5 or 1,45 (for example)
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