mirror of
https://github.com/mihakralj/QuanTAlib.git
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Miha Kralj
33 lines
1.2 KiB
Plaintext
33 lines
1.2 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("Trade Volume Index (TVI)", "TVI", overlay=false)
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//@function Calculates Trade Volume Index
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//@param price Price series for tick direction analysis
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//@param vol Volume series for weighting
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//@param min_tick Minimum price movement to register direction change
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//@returns Trade Volume Index value
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//@optimized for performance and dirty data
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tvi(series float price, simple float min_tick, series float vol=volume) =>
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float p = nz(price, close), float v = nz(vol, 0.0)
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float pp = nz(p[1], p)
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float price_change = p - pp
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var int direction = 1
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var float tvi_sum = 0.0
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direction := price_change > min_tick ? 1 : price_change < -min_tick ? 0 : direction
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tvi_sum += direction == 1 ? v : -v
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tvi_sum
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// ---------- Main loop ----------
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// Inputs
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i_price_source = input.source(close, "Price Field", tooltip="Open, High, Low or Closing price")
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i_min_tick = input.float(0.125, "Min. Move", minval=0.0001, tooltip="Minimum price change to register direction")
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// Calculation
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tvi_value = tvi(i_price_source, i_min_tick)
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// Plot
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plot(tvi_value, "TVI", color=color.yellow, linewidth=2)
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