Hi all, it is solved.
I login into a demo account from the same broker, and switch back.
The line magically disappeared.

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Hi guys I recently reinstalled MT5, and I am looking for suggestions to remove this line on my chart, as shown at price 1.10820.
I am using the exact same indicator and template as before I reinstall the terminal, I did not have this issue before.
This line comes up in every currency pair for only once, at different locations.
It cannot be selected or deleted, it does not appear in object list.
It is not caused by my indicator or EA, because I only use 2 moving averages, and other 2 thing I programmed that I know 100% does not draw a horizontal line (or any line).
If anyone can tell me what may cause this and how I remove it, thank you.