The choppiness of the Nasdaq continues. In the last 12 months, the index has traded as high as 2,551, and it is now at 1,591.7. With the low prices on numerous Nasdaq stocks, and many of these stocks being heavily shorted, it's a good time for short-squeeze opportunities.A short squeeze takes place when short sellers quickly cover their positions on optimistic news, which can move the price of the stock up sharply. The metric for measuring short-squeeze opportunities is the short ratio, which is the number of days it would take the short-sellers to cover their positions based on recent average daily volume. Stockpickr has reviewed the heavily shorted Nasdaq stocks and compiled a list of the Top Nasdaq Short-Squeeze Plays for February. To read more, visit Stockpickr.com.