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https://github.com/mihakralj/QuanTAlib.git
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Miha Kralj
24e86d762a
- Updated BBWN, BBWP, CCV, CV, CVI, EWMA, GKV, HLV, HV, Jvolty, JVOLTYN, MASSI, NATR, RSV, RV, RVI, TR, UI, VOV, VR, YZV indicators with documentation links. - Added documentation links for Aberration, Acceleration Bands, Andrews' Pitchfork, Adaptive Price Zone, ATR Bands, Bollinger Bands, Center of Gravity, Donchian Channels, Decay Min-Max Channel, Detrended Synthetic Price, EACP, EBSW, HOMOD, Jurik Volatility Bands, Keltner Channel, MA Envelope, Min-Max Channel, Price Channel, Regression Channels, Standard Deviation Channel, Stoller Average Range Channel, Super Trend Bands, Ultimate Bands, Ultimate Channel, VWAP Bands, and VWAP with Standard Deviation Bands.
37 lines
1.2 KiB
Plaintext
37 lines
1.2 KiB
Plaintext
// The MIT License (MIT)
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// © mihakralj
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//@version=6
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indicator("Relative Strength Index (RSI)", "RSI", overlay=false)
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//@function Calculates Relative Strength Index using Wilder's smoothing
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//@param src Source series to calculate RSI for
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//@param len Lookback period for RSI calculation
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//@returns RSI value measuring momentum and overbought/oversold conditions
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rsi(series float src, simple int len) =>
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if len <= 0
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runtime.error("Length must be greater than 0")
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float u = math.max(src - src[1], 0)
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float d = math.max(src[1] - src, 0)
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float alpha = 1/len, float smoothUp = 0.0, float smoothDown = 0.0
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if bar_index < len
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smoothUp := u
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smoothDown := d
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else
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smoothUp := nz(smoothUp[1]) * (1 - alpha) + u * alpha
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smoothDown := nz(smoothDown[1]) * (1 - alpha) + d * alpha
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float rs = smoothDown == 0 ? 0 : smoothUp/smoothDown
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float rsi = smoothDown == 0 ? 100 : 100 - (100 / (1 + rs))
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rsi
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// ---------- Main loop ----------
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// Inputs
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i_length = input.int(14, "Length", minval=1)
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i_source = input.source(close, "Source")
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// Calculation
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rsi_value = rsi(i_source, i_length)
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// Plot
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plot(rsi_value, "RSI", color=color.yellow, linewidth=2)
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