i was thinking of switching to ninja for automated trading feature, but their micro commissions are expensive
Micro commissions are generally expensive compared to e-minis.
I have the lifetime license, so my RT cost is $2.04 for one e-mini and $0.56 for 1 micro.
In comparison using 10 micros the RT cost is $5.60 for the equivalent of one e-mini.
I don't know how other retail brokers compare, but I was under the impression that Ninja's rates are fairly competitive.