Generally the on tick block is unnecessary on the on tick tab, I do not know about the delay block, I think it stops the terminal, but you would have to test to see what it does
That depends on why the EA wants to open a new trade, multiple trades at same time means you are missing a no trade block, maybe a once per bar, either way, your logic set up will prevent this from happening.
Looks like you are trying to find a divergence over 1 candle on the RSI, but this rarely happens. To have a cross with MA you will need this in line with the other conditions, this is the logic - if this is true check this - then this - then this - if 3 true place a trade