Technical Indicators

SQA provides access to 150+ technical indicators via the sqa-tai gem, which wraps the industry-standard TA-Lib library.

Quick Reference

All indicators are available through the SQAI module:

require 'sqa'

prices = [100, 102, 101, 103, 105, 104, 106]

# Simple Moving Average
sma = SQAI.sma(prices, period: 5)

# Relative Strength Index
rsi = SQAI.rsi(prices, period: 14)

# Bollinger Bands (returns 3 arrays: upper, middle, lower)
upper, middle, lower = SQAI.bbands(prices, period: 20)

Indicator Categories

Overlap Studies (Moving Averages)

• SMA - Simple Moving Average
• EMA - Exponential Moving Average
• WMA - Weighted Moving Average
• DEMA - Double Exponential Moving Average
• TEMA - Triple Exponential Moving Average
• T3 - Triple Exponential Moving Average (T3)
• MA - Moving Average (configurable type)

Momentum Indicators

• RSI - Relative Strength Index
• STOCH - Stochastic Oscillator
• STOCHF - Stochastic Fast
• STOCHRSI - Stochastic RSI
• MACD - Moving Average Convergence Divergence
• MOM - Momentum
• ROC - Rate of Change
• CCI - Commodity Channel Index
• WILLR - Williams' %R

Volatility Indicators

• ATR - Average True Range
• NATR - Normalized Average True Range
• TRANGE - True Range
• BBANDS - Bollinger Bands

Volume Indicators

• AD - Chaikin A/D Line
• ADOSC - Chaikin A/D Oscillator
• OBV - On Balance Volume

See Individual Indicators

Browse the navigation menu for detailed information about each indicator.

Common Patterns

Single-Value Indicators

# Returns array of values
values = SQAI.rsi(prices, period: 14)
current_rsi = values.last

Multi-Value Indicators

# MACD returns 3 arrays
macd_line, signal_line, histogram = SQAI.macd(prices)

Indicators Requiring Multiple Inputs

# ATR needs high, low, close
high = [105, 107, 106, 108]
low = [103, 104, 103, 105]
close = [104, 106, 105, 107]

atr = SQAI.atr(high, low, close, period: 14)

Full Indicator List

To see all available indicators:

SQAI.methods.grep(/^[a-z]/).sort

This will list all 150+ indicators in alphabetical order.