"STP is the abbreviation for Self Trade Prevention and is the function to cancel order automatically
to prevent orders entered by IDs under the same sub-participant from being matched each other.
Usage of STP is optional.
Although it is described in the J-GATE Connectivity Manual that those who use STP function choose
either ""Cancel New"" or ""Cancel Old"" in advance, ""Cancel Old"" can only be set currently due to system restriction."