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I have been wanting to place a trailing one bar stop on entry
You need to define the buy and close in a way that avoids overlap in the trading conditions otherwise you will buy and sell in the same bar. I mean the conditions to buy and sell cannot be true at the same time. In your ea I think that is the case.
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not sure how to define NO TRADE ENTRY for market gap opens
If you mean do not trade if there is a gap, you need to come up with a definition for gap that you are comfortable with
A gap can be as simple as open > previous close*1.05 (so the open is higher by 5%). The easiest way to define this is to use the ea signal builder icon. You define it visually comparing a bar with an indicator line.