Base period is used for indicators which have unstable period of calculations.

Indicators listed below are marked as unstable-period indicators in code:

• ADX - Average Directional Movement Index
• ADXR - Average Directional Movement Index Rating
• ALLIGATOR - Alligator
• APO - APO
• ATR - Average True Range
• AWESOME - Awesome Oscillator
• AWESOME2 - Awesome Oscillator
• BBANDS - Bollinger Bands
• BBANDSFIB - Bollinger Bands - Fibonacci Ratios
• BBANDWIDTH - Bollinger Bandwidth
• BEARP - Bear Power
• BULLP - Bull Power
• BUTTERWORTH - Butterworth Filter
• CAMPIVOT - Camarilla Pivots
• CDLMORNINGDOJISTAR - Morning Doji Star
• CDMI - Chande's Dynamic Momentum Index
• CHAIKIN_VOLATILITY - Chaikin's Volatility
• CHOP_INDEX - Choppiness Index
• CMO - Chande Momentum Oscillator
• COG - Center of gravity
• CQS - Chande's QStick
• CSS - Currency Slope Strength
• DARVAS_BOX - Darvas Box
• DEMA - Double Exponential Moving Average
• DISP_INDEX - Disparity Index
• DMI - Average Directional Movement Index
• DX - Directional Movement Index
• EF_TRANSFORM - Ehlers Fisher Transform
• ELLOSC - Elliott Oscillator
• EMA - Exponential Moving Average
• EMAENVELOPE - EMA Envelope
• FIBPIVOT - Fibonacci Pivot
• FORCEI - Force Index
• FRACTALLINES - Fractal Lines Indicator
• GANN_HILO - Gann HiLo Activator
• GANN_SWING - Gann Swing Oscillator
• GANN_TREND - Gann Trend Oscillator
• GATOR - Gator Oscillator
• HEIKINASHI - Heikin Ashi
• HEIKINASHILINES - Heikin Ashi Lines
• HEIKINASHISINGLE - Heikin Ashi with a single candle output
• HEIKINASHISMLINES - Heikin Ashi Smoothed Lines
• HEIKINASHISMOOTH - Heikin Ashi with smoothed indicator
• HT_DCPERIOD - Hilbert Transform - Dominant Cycle Period
• HT_DCPHASE - Hilbert Transform - Dominant Cycle Phase
• HT_PHASOR - Hilbert Transform - Phasor Components
• HT_SINE - Hilbert Transform - SineWave
• HT_TRENDLINE - Hilbert Transform - Instantaneous Trendline
• HT_TRENDMODE - Hilbert Transform - Trend vs Cycle Mode
• ICHIMOKU - Ichimoku
• ICHIMOKUVF - Ichimoku VF
• INERTIA - Inertia
• KAIRI - Kairi
• KAMA - Kaufman Adaptive Moving Average
• KBANDS - Keltner Bands (Based on ATR)
• KDJ - Random Index
• KURTOSIS - Kurtosis
• LAGACS1 - Laguerre-ACS1
• LRSI - Ehlers Laguerre Relative Strength Index
• LWMA - Linear Weighted Moving Average (LWMA)
• MA - Moving average
• MACD - Moving Average Convergence/Divergence
• MACDEXT - MACD with controllable MA type
• MACDFIX - Moving Average Convergence/Divergence Fix 12/26
• MAMA - MESA Adaptive Moving Average
• MAMA2 - MESA Adaptive Moving Average
• MASS_INDEX - Mass Index
• MAVP - Moving average with variable period
• MCCLHIST - McClellan Histogram
• MCCLOSC - McClellan Oscillator
• MCCLSUM - McClellan Summation Index
• MFI - Money Flow Index
• MINUS_DI - Minus Directional Indicator
• MINUS_DM - Minus Directional Movement
• NATR - Normalized Average True Range
• OBV - On Balance Volume
• OSMA - Moving Average of Oscillator
• PIVOT - Pivot
• PLUS_DI - Plus Directional Indicator
• PLUS_DM - Plus Directional Movement
• PPO - PPO
• RAINBOW - Rainbow Charts
• RAINBOW_OSC - Rainbow Oscillator
• RMI - Relative Momentum Index
• RMTA - Recursive Moving Trend Average
• RSI - Relative Strength Index
• S&R - Support and Resistance
• SMI - Stochastic Momentum Index
• SMMA - Smoothed Moving Average (SMMA)
• STARC_BANDS - Stoller Average Range Channels (STARC Bands)
• STOCH - Stochastic
• STOCHF - Stochastic Fast
• STOCHRSI - Stochastic Relative Strength Index
• STOCHRSI - Stochastic Relative Strength Indicator
• ST_CYCLE - Schaff Trend Cycle
• T3 - Triple Exponential Moving Average (T3)
• TCF - Trend Continuation Factor
• TD_C - TD Combo
• TD_S - TD Sequential
• TEMA - Triple Exponential Moving Average
• THRUSTBAR - Thrust Bar
• THRUSTOUTSIDEBAR - Thrust Outside Bar
• TII - Trend Intensity Index
• TOSC - Trend Oscillator
• TRENDENVELOPES - Trend Envelope
• TRIX - 1-day Rate-Of-Change (ROC) of a Triple Smooth EMA
• TSI - True Strength Index
• VIDYA - Chande's Variable Index Dynamic Average
• VQI - Volatility Quality Index
• WADDAHAT - Waddah Attar Trend
• WOODPIVOT - Woodie Pivot
• ZIGZAG - ZigZag