Quote from 2cents:
as long as you dont attempt to use high leverage against the bank's quotes on a gapping pair on news, and your acct doesn't register 50% (negative) P&L swings at short notice, they wont mind... just fyi, even if they provide you with Currenex access, Currenex is monitoring your activity (their SniperPolice TM thing)... hope its clear
If I understand you correctly, banks will let a traders margin fall below the agreed amount granted for opening trades. But lower margin only applies under the conditions circumscribed above and on existing accounts - not for opening new trades. Opening trades, from what i understand, must use the original leverage agreed to. In this case, around 33 - 50:1
As an aside, i'm still unclear on whether banks trade against clients.
On the face of it, it appears they do - evidenced by their refusal to offer high leverage. Am I wrong? Or is this something we can't know for sure, but only deduce by their reluctance to offer higher leverage?

