Does anyone know how to place a vertical spread order on TDA? It can be placed as two separate orders and the commissions are not very different ($10 fixed plus $0.75 per contract). I am looking for an order type where both legs are executed ONLY if I get my target price (bid on the long, ask on the short) on both legs. Also, the spread will enable better use of total buying power than just the long or short leg alone. I hope the question is clear !!