[FIX Protocol] Understanding OrdStatus[39] and ExecType[150] in FIX4.4

Both are for Execution Report[8], while ...

OrdStatus[39] identifies current status of order.

Valid values:

0 = New

1 = Partially filled

2 = Filled

3 = Done for day

4 = Canceled

<5 has been removed~!>

6 = Pending Cancel (e.g. result of Order Cancel Request <F>)

7 = Stopped

8 = Rejected

9 = Suspended

A = Pending New

B = Calculated

C = Expired

D = Accepted for bidding

E = Pending Replace (e.g. result of Order Cancel/Replace Request <G>)

http://www.onixs.biz/fix-dictionary/4.4/tagNum_39.html

ExecType[150] describes the specific ExecutionRpt. (I guess it implies the action just executed on sell side ... Rather than the current status of that order, separated terms with different "nature")

Valid values:

0 = New

3 = Done for day

4 = Canceled

5 = Replace

6 = Pending Cancel (e.g. result of Order Cancel Request <F>)

7 = Stopped

8 = Rejected

9 = Suspended

A = Pending New

B = Calculated

C = Expired

D = Restated (ExecutionRpt sent unsolicited by sellside, with ExecRestatementReason <378> (378) set)

E = Pending Replace (e.g. result of Order Cancel/Replace Request <G>)

F = Trade (partial fill or fill)

G = Trade Correct (formerly an ExecTransType <20> (20))

H = Trade Cancel (formerly an ExecTransType <20>)

I = Order Status (formerly an ExecTransType <20>)

http://www.onixs.biz/fix-dictionary/4.4/tagNum_150.html

Oh, my supervisor gave me this one to read then ... And I have read for around an hour to figure out more on the difference between ExecType & OrdStatus ... together with the behaviour of amending orders: 

http://www.fixdeveloper.com/2014/05/fix-44-order-state-change-matrices.html

An example captured:

C.3 - Replace to decrease quantity 

C.3.a - Cancel/replace request sent whilst execution is being reported, the requested order qty exceeds the cum qty. Order is replaced then filled

Time	Message Received (ClOrdID, OrigClOrdID)	Message Sent (ClOrdID, OrigClOrdID)	Exec Type	OrdStatus	Order Qty	Cum Qty	Leaves Qty	Last Qty	Comment
1	New Order(X)				10000
2		Execution(X)	Rejected	Rejected	10000	0	0	0	If order is rejected
2		Execution(X)	New	New	10000	0	10000	0
3		Execution(X)	Trade	Partially Filled	10000	1000	9000	1000	Execution for 1000
4	Replace Request(Y,X)				8000				Request a decrease order quantity to 8000 (leaving 7000 open)
4		Execution(X)	Trade	Partially Filled	10000	1500	8500	500	Execution for 500 sent. Replace request and this execution report pass each other on the connection
5		Cancel Reject (Y,X)		Partially Filled					If request is rejected by salesperson
5		Execution (Y,X)	Pending Replace	Pending Replace	10000	1500	8500	0	"Pending replace" order status takes precedence over "partially filled" order status
6		Execution(X)	Trade	Pending Replace	10000	1600	8400	100	Execution for 100 occurs before cancel/replace request is accepted
7		Cancel Reject (Y,X)		Partially Filled					If request is rejected by trader/exchange
7		Execution (Y,X)	Replace	Partially Filled	8000	1600	6400	0	Replace is accepted as requested order qty exceeds cum qty
8		Execution (Y)	Trade	Filled	8000	8000	0	6400	Execution for 6400.