Good and if they raised their margin requirement it would theoretically be useful to mention that too.
This abnormal trading pattern that was noted between Etrade and Scottrade (if even remotely true) should have been a trigger to notify FINRA.
If you are a trader with the above two entities how do you coordinate which MM gets your business and where the execution occurs. HFT's and hidden bids/asks and trading in small decimals and not having the brokerage complicit??????