"There is no distinction between API orders and orders submitted via TWS with respect to ECN rebates"...
thanks for clarification!If you are using the fixed commission structure, the ECN fee is built into the per share fee so there is no extra ECN fee. You do pay ECN fees (or get rebates) using the tiered commission structure.
So if I use Ninjatrader with TWS and place all my orders via NT....is that considered an API routed trade?
Since API routed orders are under fixed treatment ( even if I am tiered for TWS orders ), I will be able to tell you if it is the case soon. But I wouldn't have much hope, this particular IB CS rep gave me numerous false answers.