If you are noticing an unusual behavior while drawing (i.e. you can’t set an anchor point to a specific area), then you might be working with Magnet Mode enabled . Magnet Mode makes all the movable drawings attach to OHLC values, hence the difficulties with moving the cursor.
To disable Magnet Mode, press the magnet icon on the left-hand side menu (the icon should turn white when disabled).
Please make sure that Magnet Mode is disabled on your chart:
Magnet Mode may also be enabled or disabled by holding Ctrl/Command key while drawing: