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littlebigcrypt
2018년 9월 13일 오후 7시 19분

DFT - Dominant Cycle Period 8-50 bars - John Ehler 

BITTREX:BTCUSDT
Bitcoin / TetherBittrex

설명

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This is the translation of discret cosine tranform (DCT) usage by John Ehler for finding dominant cycle period (DC).
The price is first filtered to remove aliasing noise(bellow 8 bars) and trend informations(above 50 bars), then the power is computed.
The trick here is to use a normalisation against the maximum power in order to get a good frequency resolution.
Current limitation in tradingview does not allow to display all of the periods, still the DC period is plot after beeing computed based on the center of gravity algo.

The DC period can be used to tune all of the indicators based on the cycles of the markets. For instance one can use this (DC period)/2 as an input for RSI.

Hope you find this of some interrest.

릴리즈 노트

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Fixing the High pass filter period. Now selectable.
OscillatorsTrend AnalysisehlersCyclescycledominantDFT
코멘트
anoojpatel
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Great job! I love this script! Using DCT and MUSIC was something I saw in his slides somewhere but never got a chance to implement. Looks good!
harkalada31
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Great script!
Below you can find a solution of plots limitation.
Hope this helps.

min = 8
l1 = hline(min + 0, color=color.new(#000000, 100), linewidth=0, linestyle=hline.style_dotted)
l2 = hline(min + 1, color=color.new(#000000, 100), linewidth=0, linestyle=hline.style_dotted)
l3 = hline(min + 2, color=color.new(#000000, 100), linewidth=0, linestyle=hline.style_dotted)
l4 = hline(min + 3, color=color.new(#000000, 100), linewidth=0, linestyle=hline.style_dotted)
l5 = hline(min + 4, color=color.new(#000000, 100), linewidth=0, linestyle=hline.style_dotted)
l6 = hline(min + 5, color=color.new(#000000, 100), linewidth=0, linestyle=hline.style_dotted)
l7 = hline(min + 6, color=color.new(#000000, 100), linewidth=0, linestyle=hline.style_dotted)
etc. up to l44 = hline(min + 43, color=color.new(#000000, 100), linewidth=0, linestyle=hline.style_dotted)
after that use fill function
Transperancy = 30
fill(l1, l2, color=setColor(DB_8, minDb,maxDb), transp=Transperancy)
fill(l2, l3, color=setColor(DB_9, minDb,maxDb), transp=Transperancy)
fill(l3, l4, color=setColor(DB_10, minDb,maxDb), transp=Transperancy)
fill(l4, l5, color=setColor(DB_11, minDb,maxDb), transp=Transperancy)
fill(l5, l6, color=setColor(DB_12, minDb,maxDb), transp=Transperancy)
fill(l6, l7, color=setColor(DB_13, minDb,maxDb), transp=Transperancy)
fill(l7, l8, color=setColor(DB_14, minDb,maxDb), transp=Transperancy)
fill(l8, l9, color=setColor(DB_15, minDb,maxDb), transp=Transperancy)
fill(l9, l10, color=setColor(DB_16, minDb,maxDb), transp=Transperancy)
etc. up to fill(l43, l44, color=setColor(DB_50, minDb,maxDb), transp=Transperancy)
littlebigcrypt
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@harkalada31, thanks for this. I'll give it a try!
InSilico
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Nice!
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