I want to make some changes because it's not working very well.
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The indicator works as follows:
After installing the indicator on the chart, one or more primary lines are displayed on the chart.
For each primary line displayed on the chart, two secondary lines also appear and are associated with that primary line.
The upper secondary line is the line above the primary line.
The lower secondary line is the line below the primary line.
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How alerts are created
The alerts work very well.
There are two types of alerts: Crossover alerts and Position alerts.
>> Crossover alerts create alert arrows on the first line of the indicator window. Roughly speaking, a crossover alert is created when:
The candlestick's high price is between the main line and the upper secondary line
And the candlestick's low price is between the main line and the lower secondary line

>> Position alerts create a colored dot on the second line of the indicator window.
Roughly speaking, a position alert appears when:
The candlestick's close price is between the level of the main line and one of the two secondary lines.

I don't want the alerts' operating mode to be changed.
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I want to change the indicator's line selection mode.
Currently, lines are selected by simply clicking on one of the lines.
After trying this selection mode for a long time, I no longer want it.
I want each group of lines (main lines and associated secondary lines) to be selected simultaneously, and by double-clicking.
If the main line is selected, I want the two associated secondary lines to be selected as well.
If the main line is deselected, I want the two associated secondary lines to be deselected as well.
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Moving the Main Lines
Currently, moving the main lines seems to work well. Therefore, I don't want to change how it works.
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Moving the Secondary Lines
Currently, moving these lines doesn't work very well:
The movement of these lines differs depending on the type of chart on which I position the indicator.
Sometimes the distances between the lines are equal, sometimes they are unequal.
Sometimes the position of the two secondary lines never stays at the price level where I positioned them, and automatically returns to their previous level.
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I therefore want to change the movement mode of these two secondary lines.
As a reminder, I want these two lines to always be equidistant from the main line.

I want the movement of these lines to work as follows:
If I hold down the click on the upper secondary line, I should be able to move this line up or down.
When I release this line, I want the distance (between the lower secondary line and the main line) to update and be equal (to the distance between the upper secondary line and the main line).
I want the lower line to update when I release the line.
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