constant slope of an indicator

Viewing 2 posts - 1 through 2 (of 2 total)

Author

Posts
02/21/2021 at 2:18 PM #162190 quote
gnellas77
Participant

Average
hi there, i want to extend a previous question of mine,

i want to screen stocks that their bollinger bandwidth indicator has a constant slope for the last 10 days lets say. Actually it would look like an almost straight horizontal line with small fluctuations. the following algorithm i received it is valid but returns the bollinger bandwidth indicator as an almost straight line but for some stocks it returns it with an upward slope:
```
Periods = 10
Bol   = BollingerBandWidth[20](close)-BollingerBandWidth[20](close)[1]
Cond    = summation[Periods]((Bol >= 0) AND (Bol <= 0.01)) = Periods

SCREENER[Cond]
```
in order to have an almost horizontal line of the bollinger bandwidth indicator for the last 10 days i thought to use the dy/dx formula that gives the slope of a line. for the y-values i use the bollinger bandwidth values and for the x-values i thought to use past days with the help of “day” or “days” command. Assuming that Bol is the dy how can i write the dx formula (in order for the Bol to be divided by 1, Bol[2] to be divided by 2 and so on…

thank you.
02/22/2021 at 9:41 AM #162310 quote

Nicolas
Keymaster

Legend

a “flat” line is purely visual. In your indicator you are measuring the variation in points, which can be very different from an intrusment to another!

You should use the BB% indicator which is the percentage of the price minus the lower band divived by the bands difference, so it is somehow ‘universal’ for all instruments.

gnellas77 thanked this post
Author

Posts