Thank you so much. kvak.
Mladen has already produced an update (it looks a lot more interesting than the first version):
[If I had a say in it - which I don't as Mladen is sacrosanct - I would dispense with level1 up and down and replace it by an LWMA9 with colour change on slope change; then you would have an indicator that functions during ranges (level 3 up and down) and during trends (LWMA9). But what do I know. Should you have time on your hands and be interested, you could - if you want - think about such a modification + BT. Afterwards you could always post it as a suggestion on "experiments while waiting ...." on FF for clearance if needed...)
Here it is:
