To remove certain symbols from the Market Watch:

1- First, go to the Market Watch section in MetaTrader and click on the Symbols option.

2- Then, right-click on the desired symbol and select the Hide option.

Alternatively, you can click on the Symbols option in the opened menu. In this section, you can:

1- Manually search for symbols in this section

2- Or go through the categorized list and locate your desired symbol

Finally, after selecting the desired symbol, click on the Hide Symbol option.

As a result, the selected symbol will be removed from your Market Watch.