May I ask, are you using the final close of each 5min' bar as a limit price for you entry on the cross, or just sending a market ?
How have fills been ?
I have played with the idea of using say a 5ema (or smaller) price of the last bar for my limit price . This does two things one it sometimes stops you paying too much, ie getting in at the high of the previous bar. Though it also can allow you to miss the trade, because the price of the new bar doesn't back far enough to get in.
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I guess as far as filters or an earlier entry, how about watching ES on the same system set up, but enter on SPY when ES gives the cross, can be sometimes quicker (on the one min' anyway).
Do you trade SPY through ISLD or has that stopped now ?
Is this something your actually trading now as far as a system ? It looks like the .20 stop is to tight for a 5 min' bar, have you had problems with this ?
" I am currently trading this for approx. a month with 200 shares using the SPY and am slightly positive but not enough to make a living even with increasing the size. I use a limit order and usually get filled if its moving slowly I move up the price if its running i consider it a lost opportunity. I use smart routing on IB which is usually ARCA,not as good as ISLD but not too bad. The stop has not been a problem, increasing the win/loss ratio or win/loss ratio is the problem