Final test with Etrade today. This one went much better as price action didn't immediately reverse on me as soon as I entered. Still couldn't get in or out without market orders, so being in the trade was making me nervous. Hit the sell as soon as I saw that I had recovered the losses from the two previous failed etrade trades. Probably won't stick with etrade much longer. Seems to add a level of "unknown" that adds more risk. Just glad to basically break even here.