Quote from Fishbird:
You actually take random trades even though you think you dont. When you trade a specific setup /chartpattern/situation and your chosen market is highly random, then you still wont win or make the same as if you just flipped a coin.
when i see some idiot buying/selling an ETF far above/below it's NAV pre or post market and i short/buy that fool then that is not a random trade.
when i see the same after hours program runs that puts a stack of bids or offers up/down to the level one bid/offer and i take those shares then that is not a random trade.
waiting for a massive seller to quit pushing down a stock by himself (aka AMR a few days ago).
buying/selling a stock that has a big imbalance (AMEXs especially) and trying to catch the print up on the close is not random. MWA.B and GRC from friday are examples. watch the imbalances today. you will see some pretty non-random stuff there.
when you trade order flow things get a lot less random.

you might actually have a future trading.