Yes, it means nobody wanna buy at the price you put your sell order. Just be patient and wait until someone will put a higher price. Otherwise if you wanna sell your coins quickly just accept bid price. So "Bid Price" is the highest amount traders wanna pay to buy coins, while "Ask Price" is the lowest amount traders wanna pay in order to sell your coins. Obviously bid price is usually lower than ask price because people wanna pay less to buy coins. While "Last trade price" (or similar expressions on other exchanges) means the last trade price.