I've been using E*Trade Pro for about 3yrs, and have been very happy with the tools.. after getting your etrade account it only takes a few trades to qualify for the Pro.. but they have a web based program called market trader that offers real time quotes and a nice order tool.. My view on picking an online broker is the more tools the better plus you want a good price and e*trade has a bank also...
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a] Word of mouth ad, like right click elite''brokers'', top green line, this page.
z]Like OXPS for thier free , readable, pro charts;
Interactive Brokers, SMART route, other reasons related in line ''a''
Cashmo;
Prefer end of day data mainly which I record daily on college rule notebook paper, & blue, black , red, green ink.......