medved trader works perfect with my tdameritrade account, but iam having problems with my tradeking account. for example, (1) i dont see my balances on my trade ticket, (2) when i place an order i get a margin warning even though iam well below my my max margin (3) when i cancel an order it say's "cancel pending" for like five minutes.why does medvedtrader works perfect with tdameritrade and horrible with tradeking?