Yes. Before trading ends, you can try to sell some or all of your shares.
You have two choices:
Selling requires another trader willing to buy your shares. The displayed position value is not a guaranteed exit amount.
Example: You bought 10 YES shares at $0.40. If the best available bid later rises to $0.65, selling all 10 would have a trade value of $6.50 before fees.
Selling before resolution can lock in a profit, reduce a loss, or reduce your exposure. If you hold until final resolution, winning shares redeem for $1.00 and losing shares are worth $0.