i use trade-alerts as well, but i also have realtick's hottrend running so i'll see either of them.
hottrend doesn't work anywhere near as well as tradealerts but sometimes can alert me to things i wouldn't pick up.
i haven't had trade-alerts open the past couple months because i've had a bunch of positions on most of the time, but when i don't have as many good trades that i manually find, i'll fall back on trade-alerts. it's an awesome product.
edit: also, i use some type of oscillator to spot an overbought/oversold stock, and then try and get in pieces; works on broker that charges per share, not per trade, and doesn't have to show all size of your trade.