Why hasn't my order filled?

An order fills only when another Investor is willing to trade at your price. If your buy limit is below the lowest ask, or your sell limit is above the highest bid, the order waits in the order book.

You can improve your price to move closer to the other side, or leave the order working (GTC) and wait for the market to reach you. With few participants, orders can take time to fill, or may not fill at all.

There is no guarantee of an active, liquid secondary market for any specific security.