The 23-year-old Ivorian midfielder, currently with French side Evian, has been training with the Addicks this week having previously been on trial with Hull.
"He's someone we've seen before and we had the opportunity to bring him in this week," said Powell.
"He has acquitted himself very well and hopefully he'll be here for the game (against Doncaster) on Saturday, then if we are going to take it further we will do so although there are a lot of factors involved. We'll see how it goes."
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