A couple of things: Their trade is extremely slow, especially limit order. You have much higher success rate at Etrade if you do limit order. At Fidelity, you stuck there for long time.

They change the margin requirement to their advantage at teh worst day. I just find out a couple of stocks' margin requirement get changed to 100%(no margin) over night(in the warst day, Sept 29). That is when you need to most. At Etrade, the same stock still has 50% margin.

Fidelity also charge much higher fees for mutual fund trade because they probably want you to its mutual funds, which only the junky oone are open. Fidelity really sucks! Avoid!