Stack Exchange's license to display this answer has been automatically terminated due to a license violation by Stack Exchange. See section 7.

Because what if nobody wants to buy at that price any more?

When the buy price and the sale price meet, a transaction happens, and those prices are removed from the market. That means there's always a gap between the highest buy price and the lowest sell price. No more trading happens until someone decides to increase the buy price or decrease the sell price.

So, the direction of movement depends on whether the buyers or the sellers get more desperate to make a transaction happen.

Because what if nobody wants to buy at that price any more?

When the buy price and the sale price meet, a transaction happens, and those prices are removed from the market. That means there's always a gap between the highest buy price and the lowest sell price. No more trading happens until someone decides to increase the buy price or decrease the sell price.

So, the direction of movement depends on whether the buyers or the sellers get more desperate to make a transaction happen.

Stack Exchange's license to display this answer has been automatically terminated due to a license violation by Stack Exchange. See section 7.