Greetings, and I humbly request the skilled coders here to tweak the attached indicator (target-bands-indicator) to add functionality to the center line.

The aim is to show alerts only in accordance with the slope of the center line. In other words, alerts would be given as follows:

LONG SIGNAL - Center line slope is up and price tags lower band
SHORT SIGNAL - Center line slope is down and price tags upper band
LONG AND SHORT SIGNALS - Center line slope is neutral and price tags either band.

The functionality I have in mind is as shown in the attached screenshot from the FastTMAline indicator (attached), with the addition of item 3) below:

1) Trend threshold [selectable, e.g. 0.2]
2) Show center line TRUE/FALSE
3) Filter alerts by slope of center line TRUE/FALSE

Finally, the center line color should be selectable and change in accordance with the slope threshold setting, as in the FastTMAline indicator.

A million thanks in advance.