^^^^ this go read it learn it put it in vanguard and enjoy life. Day trading is for suckers.
Note also that "vanguard" is better than "invest it in vanguard funds through E*Trade".
(a) E*Trade doesn't let you invest in the Admiral shares funds that have the lowest expense ratios;
(b) They ding you $19 per trade to get in and out, and vanguard doesn't.
Those little things add up. My experience is also that vanguard's funds transfers are
also faster than E*Trade's.
(I have both - I had an E*Trade account going back to 1999 from before I knew better.
I'm in the process of moving my last account away from E*Trade.)