Does anyone know of any similar brokerages that offer the same pricing structures as the likes of TraderDealer and PariTrade were you can round trip multiple times during one day and only be charged for the buy and sell order? Is there a name for this style of pricing structure?
I'm looking for that price structure but want to be able to connect the brokerage and data through to the big charting systems like NinjaTrader and AmiBroker. That way there is scope for learning to code mechanical systems.
Does this exist?