Actually I just checked and if you did 1000RT/month:
with IB you would pay $1500 in commissions vs $1000 commissions +$500 T4 platform fee with deepdiscount. So it would work out even but you would have a decent piece of software and data.
If you were doing more then 1000RT you would save $0.30/RT for the next 4500RT's and then after 4500 the commissions would be $0.10/RT cheaper for IB. If you need news and a decent front end for IB (ie. buttontrader pro) you can add $200/month. Still, you are working with 300ms snapshot quotes...
with IB you would pay $1500 in commissions vs $1000 commissions +$500 T4 platform fee with deepdiscount. So it would work out even but you would have a decent piece of software and data.
If you were doing more then 1000RT you would save $0.30/RT for the next 4500RT's and then after 4500 the commissions would be $0.10/RT cheaper for IB. If you need news and a decent front end for IB (ie. buttontrader pro) you can add $200/month. Still, you are working with 300ms snapshot quotes...