I longed roughtly 1M usd with half AUD, half EUR. IB charges couple hundred per week. how does this calculated? Meanwhile, I noticed my Account summary tab from TWS is not so accurate and realtime. Net liquidation value changed to some old value hours ago, and changed back after a while. The avg Cost for some position is apparently wrong. Say I short AUD/USD at x. it showed x(roughtly) for avg Cost initially. Then, after half hour it changed to x+6pips. It's very worrisome to me.