买涨：order = api.insert_order(symbol=code, direction= 'BUY' ,offset= 'OPEN':, volume=new_hand,imit_price=price)
卖涨：order = api.insert_order(symbol=code, direction="SELL", limit_price=price,offset="CLOSETODAY", volume=new_hand)
买跌：order = api.insert_order(symbol=code, direction="SELL", limit_price=price,offset="OPEN", volume=new_hand)
卖跌：order = api.insert_order(symbol=code, direction="BUY", limit_price=price,offset="CLOSE", volume=new_hand)
总收益：'position_profit'
总花费保证金：'margin’
