The term sell wall refers to a very large limit sell order or a cumulation of sell orders at one price level on an order book. It is the opposite of a buy wall, which refers to a large buy order or a cumulation of buy orders at one price level.
Crypto assets trading can be considered a high-risk activity, where crypto assets prices are volatile, and can swing wildly, from day to day. Please do your own research (DYOR) before making the decision to invest in, or to sell crypto assets. INDODAX is not soliciting for users to buy or sell crypto assets as an investment or for profit. All crypto assets trading decisions should be made independently by the user.