mirror of
https://github.com/mihakralj/QuanTAlib.git
synced 2026-07-27 17:27:43 +00:00
Miha Kralj
67 lines
2.3 KiB
Plaintext
67 lines
2.3 KiB
Plaintext
// Licensed under the Apache License, Version 2.0
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// © mihakralj
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//@version=6
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indicator("Accelerator Oscillator (AC)", "AC", overlay=false)
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//@function Calculates Bill Williams' Accelerator Oscillator
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//@param fastLength Period for fast MA calculation
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//@param slowLength Period for slow MA calculation
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//@returns AC value measuring acceleration/deceleration of market momentum
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ac(simple int fastLength, simple int slowLength) =>
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if fastLength <= 0 or slowLength <= 0
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runtime.error("Lengths must be greater than 0")
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if fastLength >= slowLength
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runtime.error("Fast length must be less than slow length")
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float mp = (high + low) / 2.0
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var array<float> fastBuf = array.new_float(fastLength, na)
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var array<float> slowBuf = array.new_float(slowLength, na)
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var int fastHead = 0, var int slowHead = 0
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var float fastSum = 0.0, var float slowSum = 0.0
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var int fastCount = 0, var int slowCount = 0
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float fastOldest = array.get(fastBuf, fastHead)
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if not na(fastOldest)
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fastSum -= fastOldest
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fastCount -= 1
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if not na(mp)
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fastSum += mp
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fastCount += 1
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array.set(fastBuf, fastHead, mp)
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fastHead := (fastHead + 1) % fastLength
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float slowOldest = array.get(slowBuf, slowHead)
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if not na(slowOldest)
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slowSum -= slowOldest
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slowCount -= 1
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if not na(mp)
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slowSum += mp
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slowCount += 1
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array.set(slowBuf, slowHead, mp)
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slowHead := (slowHead + 1) % slowLength
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float fastMA = fastCount > 0 ? fastSum / fastCount : na
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float slowMA = slowCount > 0 ? slowSum / slowCount : na
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float ao = fastMA - slowMA
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var array<float> acBuf = array.new_float(5, na)
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var int acHead = 0, var float acSum = 0.0, var int acCount = 0
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float acOldest = array.get(acBuf, acHead)
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if not na(acOldest)
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acSum -= acOldest
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acCount -= 1
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if not na(ao)
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acSum += ao
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acCount += 1
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array.set(acBuf, acHead, ao)
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acHead := (acHead + 1) % 5
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float aoSMA = acCount > 0 ? acSum / acCount : na
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ao - aoSMA
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// ---------- Main loop ----------
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// Inputs
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i_fastLength = input.int(5, "Fast Length", minval=1)
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i_slowLength = input.int(34, "Slow Length", minval=1)
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// Calculation
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ac_value = ac(i_fastLength, i_slowLength)
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// Plot
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plot(ac_value, "AC", ac_value >= 0 ? color.green : color.red, linewidth=2)
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