tradezero post only

does tradezero, in the us, support add liquidity only order types
for example ARCA ALO or any post only

this is in reference to their direct routing option, i can't seem to get an answer from anybody ( i don't think their online chat has an answer )

if you are wondering why, say you are long bac 21.80 x 21.81 xyz arbitrary price, and you post to 21.81 on arca, but arca decrements down to 0 but other ecns are on offer...then you will almost always accidentally remove liquidity which is basically a disaster on a stock like bac (1/3 of the spread if it routes out in terms of cost )

can anyone from tradezero, or anybody really, answer this question?
 
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