Here is a little suggestion.
The transfer forum could be retained for one more day after the end of the transfer period.
The reason is simple.
There are still players under transfer for a few hours after the expire of the tranfer period.
So, it's usefull to have this forum to see those players :)
The forum could be closed but still visible :)

Or even have it open for 4-5 days after the windows close, so that the forum is available right up until the last player has been sold?

Dont think there's any disadvantage to this or ways for people to cheat?

Yes,i have some people in the transfer,they are very good,but i can not sell them.

Yeah, it makes more sense to keep it open after the trade period finishes than it does to open it before it starts.

agree
i am looking for players to buy and i can't find
the forum would have help me and the sellers

I'm pro. I would also announce the 3rd round (now 4th) for a player but the forum is closed. just 2 or 3 days longer is not a disaster; Only interested persons will ave a look and sellers will be happy.
Good idea, Paris.

We don't do this since it would give an unreasonable amount of attention to players who are still for sale after the deadline.

This period is just meant to wrap up the active transfers.

How is that unreasonable? It might indeed give more attention to players who are still for sale after the deadline, but in this case it actually gives far less attention to players who are still for sale after the deadline.

Not far less, since they have been on the transfer list when it was still open.

Now there is a limited number of players left. Anyone who has money left can only buy these players or has to wait till the next transfer period. This could make these players sell for significantly more than players that were sold earlier. I understand this is attractive if you're the one selling a player but it's not good for natural prices.

And since the window is actually over, less attention is better than more.

I think vincent is in order to let more people to build senior scouts.In fact,if you have senior scouts,you can find a lot of player information in transfer

I always put players to the following list. If they sold I delete them, so I can see any players who I'm interested in. (And don't tell me I can only 15 players on that list, it is enough for me when transfer period is closed officially.)