Transferring IRA - Block accounts with Ninjatrader

I am considering transferring part of an IRA so I can trade it with Ninjatrader through Midland Trust. I already have a normal/taxable account with Ninjatrader for futures. My Ninja rep told me they offer "block accounts" where I can have a trade spread over multiple accounts for an extra $2.00 commission. Does anyone do this and is there a better way to trade both accounts at the same time w/o placing two separate entries?

Any suggestion about the transfer process is also appreciated

Thank you

Steve