maximum angle in lookback period.

Real Pro · 2018-07-14T03:31:33+00:00

Hiya, I’d like to compare today’s high to each of the highs in a lookback range of 20 bars. Then divide that number by the bars since that high occured, in order to find the highest angle possible between today’s high and a single high in the lookback period. Could I have some clues where to start please?

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07/14/2018 at 4:31 AM #75942 quote

Real Pro
Participant

Average

Hiya,

I’d like to compare today’s high to each of the highs in a lookback range of 20 bars. Then divide that number by the bars since that high occured, in order to find the highest angle possible between today’s high and a single high in the lookback period. Could I have some clues where to start please?

07/14/2018 at 10:03 AM #75954 quote
robertogozzi
Moderator

Legend
Angles/Slopes are impossible to be measured, this has been extensively discussed here and elsewhere. Some useful links:

https://www.prorealcode.com/topic/ema-45-degres-uptrend/

https://www.prorealcode.com/topic/indicator-for-inclination-of-moving-average/

https://www.prorealcode.com/topic/calculating-the-angle-linear-regression-of-a-line/

Anyway, to retrieve the BarIndex ID of a bar you can only use loops, since there’s no function returning that info, as of this version of PRT:
```
FOR i = 0 TO 19                  //20 bars lookback
   IF high[i] > high[i+1] THEN   //put here anything you like to check
      .
      .
   ENDIF
NEXT
```
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07/14/2018 at 10:16 AM #75956 quote

GraHal
Participant

Master

Real Pro wrote:

in order to find the highest angle possible between today’s high and a single high in the lookback period

I guess if you had said … to get a measure of the rate of change between today’s high and a single high in the lookback period ... may be less confusing and might get you the code you need? 🙂

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07/19/2018 at 3:52 AM #76274 quote
Real Pro
Participant

Average
Thanks for the help Robert and Grahal.

Grahal, that’s an excellent idea. Am I geting closer with the following?
```
FOR i = 0 TO 20                  //20 bars lookback
IF high[i] > high[i+1] THEN   //put here anything you like to check
a = high[i+1] /barindex
aa = highest[20](a)
ENDIF
NEXT
```
07/19/2018 at 4:14 AM #76275 quote

Real Pro
Participant

Average

ok that attempt was no good.

I’m trying to create a substitute for a downsloping trendline which can be auto-traded by finding (in psuedocode):

highest angle in lookback = (high[lookback] – today’s high ) / barindex

then for each bar after today, subtracting that angle to create a trigger price, until the close >trigger.

Suggestions very welcome!

07/19/2018 at 5:03 AM #76276 quote

robertogozzi
Moderator

Legend

Barindex can be 10000 or more, maybe highest angle in lookback = (high[lookback] – today’s high ) / i would be better, but I did not test it.

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