Order chain is a very useful function, If you have a long position for any asset.
In case, you are waiting for a correction or a change of trend, but you do not want to get rid of an asset, you can sell it using order chain.
You place a sell order at any price and take-profit at a lower price, which will buy back the asset.
If sell order will be executed and It will reach take-profit, you will buy back the same amount of the asset, but you will have additional funds in base currency because of the difference between exchange rate of buy and sale.
In case, the price will start to grow, you will buy back the asset using stop order.
It is important to note that the amount of asset bought back by stop order is equal to the cost of the asset sold in the main order divided on the price of stop order.