Right. OK. So set a limit buy (not OCO) for 22BTC at $400.  And a separate stop at $475 for 10.
Edit: but I don't think you'll have enough margin available to set a 22 BTC buy, even at 2.5x. Maybe enough for 20BTC after profit, but that'd be close to being maxed out on margin, which I wouldn't recommend.  Maybe just do a 15 BTC buy.
$3000x2.5=$8000.
$8000+10*$55=$8555
$8555/$400=21.3875BTC.  That's why you can't do a 22btc buy, plus there's fees and swap. Can't do 22btc buy starting with $3000.