OUCH is a binary trading protocol delivered over TCP.

By default Session Synchronisation is disabled by Currenex. So any lost messages from venue will not be replayed as MsgSeqNum is reset to 1 in the LogonResponse.

If Session Synchronisation is enabled, Venue will not reset the MsgSeqNum and thus MF will send ResendRequest on gap detection for venue to replay/gapfill.

Client need to contact MarketFactory customer support to get the Persistence feature enabled in Currenex. 

PartiallyFilled Orders cannot be Replaced. 

If MultilegOrderCancelReplaceRequest is sent for PartiallyFilled Order, the new request is Rejected and the original order is Cancelled.

The minimum permitted order entry size is 40k in the base currency, but this can vary depending on client requirements.

Please contact MarketFactory support if you wish to update this.

Currenex order service does not support term currency orders, only base currency orders are permitted.

MarketFactory does not support Currenex OXO trading (orders crossing orders trading). OXO is where clients wish to trade against anonymous liquidity and once matched trades are immediately executed. Also OXO trading is where liquidity is attached to an account.

In this context any PendingFill messages sent by Currenex are currently ignored by MF. Please contact MarketFactory support for more information.