When you copy and paste a line using hotkeys, have the new line start off on real prices, not in between usable prices like it is now. In other worse, the duplicate line should be 1, 2, 3, 4, etc. ticks below or above the start of the original, so we don’t have to disable snap to fix it. Also, it should be pasted further away from the original so it’s not as easy to accidentally select.
So the other two things I mentioned have actually been suggested before but i’ll mention them again because it’s taking so long for a fix:
Allow normal lines to be extended further without changing slope like a ray but where you can decide the end (I don’t think this has been changed yet):
Have trend lines formed from the outer line of the trend. So many requests for this for almost a year now: