Chi-X Japan New Passive Order Type
A Post-Only order type is a passive order designed to rest on the Chi-X book and never take liquidity by trading against existing passive orders. If your order would result in a cross with a resting order and remove liquidity, it will be canceled back.
WHEN IS IT AVAILABLE?
Post-Only order type will be available from November 14, 2011.
HOW TO ENTER A POST-ONLY?
In the New Single Limit Order FIX
message: (35=D, 40=2), add the tag 8021=P