Field OrigOrdModTime (586) - FIX Protocol FIX.5.0
The most recent (or current) modification TransactTime (tag 60) reported on an Execution Report for the order. The OrigOrdModTime is provided as an optional field on Order Cancel Request and Order Cancel Replace Requests to identify that the state of the order has not changed since the request was issued. This is provided to support markets similar to Eurex and A/C/E.
Added in protocol FIX.4.3