For clients who wish to trade in this nature, we do offer an institutional price feed.
On these custom symbols, there is a larger top-of-book volume available with the same low commissions that we are known for, but the spreads are naturally a little wider to account for the deeper liquidity.
This feed in general will provide less slippage from the quoted top of book price, on our standard symbols, and give you more certainty of the executed price you will receive on your trade when you enter and exit the market, and you will not need to open as many small orders to try and fill the same volume.
In regard to reduced commissions, we will need to have one month of trading data that can be reviewed. We will then be happy to discuss reduced commissions further with you and how this can be applied.