A few weeks ago I day-traded some equities instead of my usual swing trade or futures. I had a limit order absolutely perfectly positioned and price touched but didn't traded through. I should have had a few thousand shares and the trade was or would have been very profitable. I downloaded the T & S and submitted it. In my mind it wasn't a coincidence. I was using a crappy front-end from a retailer. It's funny actually to see the manipulation. Sometimes on a swing trade I'll go market in highly liquid stock or ETF with presumably minimal slippage and just get dinged. Part of the game. Hold the order til the instrument moves enough then record the transaction at the top end of the bracket. Nearly risk free fleecing. Actually this is good to see in action because you can see how why and where the money is being distributed by the industry. I suppose it is one of those things you learn from and hopefully eventually make work for you.