Hey,
To be very honest chances of conversion of any wait list depends on a lot of factors like the number of students who are ahead of you, the number of students accepting the offer and also the number of seats left.
If you are position to clear all these hurdles then you are good to get a convert.
As you have been waitlisted at number 18 so it seems a fair chance for you to get the convert.
But it still can't be said with surety.
All the best.
Thank you.
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