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Miha Kralj
86fe32a682
Co-authored-by: Claude Opus 4.5 <noreply@anthropic.com> Co-authored-by: aider (openrouter/anthropic/claude-sonnet-4) <aider@aider.chat> Co-authored-by: Warp <agent@warp.dev>
39 lines
1.4 KiB
Plaintext
39 lines
1.4 KiB
Plaintext
// The MIT License (MIT)
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// © mihakralj
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//@version=6
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indicator("Mass Index (MASSI)", "MASSI", overlay=false)
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//@function Calculates the Mass Index indicator
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//@param ema_length Period for EMA smoothing of high-low range
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//@param sum_length Period for summing the EMA ratio
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//@returns float Mass Index value
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//@optimized for performance and dirty data
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massi(simple int ema_length, simple int sum_length) =>
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if ema_length <= 0 or sum_length <= 0
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runtime.error("Periods must be greater than 0")
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float a = 2.0 / (ema_length + 1)
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float beta = 1.0 - a
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var bool warmup = true, var float e = 1.0
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var float ema1_raw = 0.0, var float ema2_raw = 0.0
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float span = nz(high - low)
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ema1_raw := a * (span - ema1_raw) + ema1_raw
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ema2_raw := a * (ema1_raw - ema2_raw) + ema2_raw
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if warmup
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e *= beta
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warmup := e > 1e-10
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float c = warmup ? 1.0 / (1.0 - e) : 1.0
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float ema1 = c * ema1_raw
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float ema2 = c * ema2_raw
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math.sum(ema2 != 0 ? ema1 / ema2 : 0, sum_length)
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// ---------- Main loop ----------
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// Inputs
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i_ema_length = input.int(9, "EMA Length", minval=1, tooltip="Period for EMA smoothing of high-low range")
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i_sum_length = input.int(25, "Sum Length", minval=1, tooltip="Period for summing the EMA ratio")
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// Calculation
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massi_value = massi(i_ema_length, i_sum_length)
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// Plot
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plot(massi_value, "MASSI", color=color.yellow, linewidth=2)
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