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0th bar

Hi all, I have found this forum very helpful with my last question - so here's another. What exactly happens during the 0th bar? I'm writing a SAR EA and I want to know whether I can safely use the 0th bar to make trading criteria. Question: Specifically for SAR, does it flip flop back and forth

Load prior history bars when attaching MT4 EA to chart

Hi all, I have looked online and as far as I can tell, this topic has not been very thoroughly addressed. Perhaps this post may be of help to others besides myself. From my current understanding, the EA only knows price data starting from the instant it is attached to the chart. So, if I'm working