Dominant Cycle calculation by band pass crossing over

Hasardeur · 2018-04-03T21:14:59+00:00

Dear Traders, Dear Nicolas, the attached code made by John Ehlers calculates the dominant cycle by counting the zero crossing over of a band pass filter. The original filter is using a fix DCPeriod of 20. I have made the code adaptive by iterative using the result of DC instead of fix DCPeriod at the beginning of the code. So far it is working well. By changing the actual shown time frame for example from 100 days to 1000 days the DC of the actual bar (today) is sometimes fluctuating. That means that for example at shown 100 days the DC of the actual bar is 14, by changing the shown timeframe 1000 days DC of the actual bar is 35. Does someone has an idea to modify the code into a correct and stable iterative Dominant Cycle Period? Many thanks for your reply in advance. Hasardeur REM --------------------------------------------- REM Modified Dominant Cycle Measured by Zero Crossing of Band Pass filter from Cycle Analytics for Traders by John F.Ehlers 2013 REM --------------------------------------------- //PeriodDC= 20 // original by John Ehlers PeriodDC= MAX(8, MIN(DC, 48)) IF barindex = 1 THEN BP= 0.01 DC= 20 ELSIF Barindex >= 2 THEN REM --------------------------------------------- REM Highpass Filter and BP or SuperSmoother Filter together form a Roofing Filter REM --------------------------------------------- HPPrice= close HPPeriod= PeriodDC HPBandwidth= 0.3 // 0.7 original Dominant Cycle Measured, 0.3 (0.10-0.50) from Roofing Filter HPalpha= (COS(0.25*HPBandwidth*360/HPPeriod) + SIN(0.25*HPBandwidth*360/HPPeriod)-1) / COS(0.25*HPBandwidth*360/HPPeriod) HP= (1+HPalpha/2)*(HPPrice-HPPrice[1]) + (1-HPalpha)*HP[1] BPPrice= HP BPPeriod= PeriodDC BPBandwidth= HPBandwidth beta= COS(360/BPPeriod) gamma= 1/COS(360*BPBandwidth/BPPeriod) BPalpha= gamma - SQRT(gamma*gamma-1) BP= 0.5*(1-BPalpha)*(BPPrice-BPPrice[2]) + beta*(1+BPalpha)*BP[1] - BPalpha*BP[2] REM --------------------------------------------- REM Calculation of Dominant Cycle by counting Zero crossing of BP REM --------------------------------------------- CountPrice= BP DC= DC[1] DC= MAX(6, DC) counter= counter + 1 IF CountPrice CROSSES OVER 0 OR CountPrice CROSSES UNDER 0 THEN DC= 2*counter ThrashH= 1.11 // original 1.25 IF 2*counter > ThrashH*DC[1] THEN DC= ThrashH*DC[1] ENDIF ThrashL= 0.90 // original 0.8 IF 2*counter < ThrashL*DC[1] THEN DC= ThrashL*DC[1] ENDIF counter= 0 ENDIF ENDIF DC= MAX(8, MIN(DC, 48)) RETURN DC coloured(0,0,255) as "DomCyclePeriod"

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08/25/2023 at 9:33 AM #219772 quote

SnorreDK
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Junior

Hasardeur wrote:

Hi Bard,

mainly I am using the following indicators for ma favorite trading system

Trend: Aroon, Ravi, Momentum: RMI, Trend following: CCI, Volume: Volume MFI

In addition I am looking for Bollinger Bands, Stochastic MADC and volume as second trading system.

The dominant cycle period indicator I am using to tune the above indicators (to the 1*period or 0.5*Period by using DC) in order to be as near as possible to the actual real cycle period.

In order to get an easy overview I have sum up the above indicators in a genesis matrix design.

Best regards

Hasardeur

How does it work out for you?

09/06/2023 at 3:37 PM #220437 quote
Meta Signals Pro
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Veteran
HI Guys,

I am looking for this indicator able to:
- take advantage of the adaptative cycles from J. Ehlers
- but precisely also to give a projection in the future of the timing of the next high/low
I have been searching the forum in vain for this tool;

Has anybody worked on this or see a code somewhere in whatever language?

Thanks for your help,

Chris

4686817171028.jpg
09/06/2023 at 4:50 PM #220447 quote

LucasBest
Participant

Veteran

I don’t think those indicators below use the adaptative cycles from J. Ehlers, but they try to predict potential future market movements :

First one from LuxAlgo

https://www.tradingview.com/script/Y8v4W3mX-The-Echo-Forecast-LuxAlgo/

and this on from zeiiermantrading

https://www.tradingview.com/script/rrT9dacO-Price-Action-Color-Forecast-Expo/

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09/06/2023 at 5:01 PM #220448 quote

LucasBest
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Veteran

You can look at Loxx scripts. Loxx made several forecast indicator with several way to prdict futur prices :

https://www.tradingview.com/u/loxx/#published-scripts

https://www.tradingview.com/script/PrvbOR2k-Nearest-Neighbor-Extrapolation-of-Price-Loxx/

https://www.tradingview.com/script/HCfWOt6F-Hodrick-Prescott-Extrapolation-of-Price-Loxx/

https://www.tradingview.com/script/8YbmmPCn-Helme-Nikias-Weighted-Burg-AR-SE-Extra-of-Price-Loxx/

etc

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09/06/2023 at 5:16 PM #220449 quote

Meta Signals Pro
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Veteran

@LucasBest,

Waw you really made my day here; big thanks; I’ll dive into it ^^

Does it mean you use cycles filters?

09/06/2023 at 5:48 PM #220454 quote

LucasBest
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Veteran

You’r welcome.

I am thinking of using some kind of cycle calculations for an indicator i am working on, but nothing similar to J.Ehlers’ one.

I know those indicators because i often look at tradinview indicators while looking for new ideas, and somtimes youtube simply propose to me videos with new/good indicators… There is a lot of really nice ones, but i will never have time to translate them all for prorealtime 🙂

Netherthelss, i don’t believe in such indicators predicting the futur. I prefer focusing on indicators that are really “tradable”, which can give a real edge, and based on simple concept (like a support, a resistance, a breakout etc).

09/06/2023 at 6:09 PM #220455 quote

Meta Signals Pro
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Veteran

LucasBest wrote:

You’r welcome.

I am thinking of using some kind of cycle calculations for an indicator i am working on, but nothing similar to J.Ehlers’ one.

I know those indicators because i often look at tradinview indicators while looking for new ideas, and somtimes youtube simply propose to me videos with new/good indicators… There is a lot of really nice ones, but i will never have time to translate them all for prorealtime 🙂

Excellent; thanks Social media algos ^^;

but shoot them please ^^ now with ChatGPT we can start to translate roughly and then debugg them, if not too complicated of course

Netherthelss, i don’t believe in such indicators predicting the futur. I prefer focusing on indicators that are really “tradable”, which can give a real edge, and based on simple concept (like a support, a resistance, a breakout etc).

I aggree on the trading side; the market will always move towards Zones to be tested;

for me, Ehlers cycles are interesting as it can prevent you to enter on the wrong Timing = for example if you forget a pullback will inevitably happen after a big up or down move or to overweight your position specially at the end of a pullback move (if we are in Cycle mode).

09/06/2023 at 6:59 PM #220459 quote

LucasBest
Participant

Veteran

It would be cool if chatGPT can translate this one…

https://fr.tradingview.com/script/TnJMMEJI-RSI-Primed-ChartPrime/

All those user’s function give me headache 🙂
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