You don't need a new topic for the same question, you already have one.
I will remove it.

Symbol specification from mql5
- www.mql5.com
A part of the symbol specification from the MT5 help: Type of orders — types of orders placed: Good till today including SL/TP — orders that are va...

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In a symbol's contract specification from the "Market Watch" there are two properties:
GTC mode and Expiration.
After pressing F1 and you can see that help says:
Type of orders — types of orders placed (I think this is the GTC mode)
....
Expiration — available types of expiration of pending orders
In MQL5 the EXPIRATION_MODE returns the second property (EXPIRATION), or not?
And how can I obtain first property?