I just started trading with them - I get 4:1 DTBP but not 2:1 overnight.. I don't even have a margin loan with them. It is less than 2:1. Here's the kicker: Their software does not show either your morning, real time or overnight buying power. Shortable shares are not available on all the hard to find stocks. I asked their trade desk and was told that MB does not have a system to record and keep track of the extra interest that is charged on these stocks and hence does not offer shortable shares in them. Lagging data feed on quotes particularly during busy periods. Customer service: Even though these guys promptly pick up the phone they are clueless and inept. Time to find another firm.