Eric j 

$10,000 units are the minimum with MB , like Sam said . I suggest reaching out to folks that have traded with MB live on NT . Scroll around the link for the FF MB thread I provided Im sure youll meet up with someone lucid thats on ninja over there . A lot of chronic whiners I suspect vent on that thread but its there to publicly air out issues with MB .

The minimum tradeable size on MBT is 1K and has been for as long as i can remember(since they were EFX anywway).

Trankuility 

Only a couple things in MC that bother me. 1) There is a gap between each of the range bars. I made a post on their forum about this. And 2) Up and Down bars can not have their colors changed easily. You have to use a custom paintbar study (indicator) to paint over the bars so up bars are green and down bars are red. Which isn't too big of a deal but it also means the little open and close marks are off-color which is a slight annoyance.

I'll add this one. They don't have a Ray Trendline tool. When I asked them about it, they said "huh, we already have a line tool." Lost.