Overview
The RSI is popular indicator developed by trader Welles Wilder. The RSI is a popular indicator that shows comparative price strength within a single security.

Interpretation
The most widely used method for interpreting the RSI is price / RSI divergence, support / resistance levels and RSI chart formations.

Overview
The Mass Index identifies price changes by indexing the narrowing and widening change between high and low prices.

Interpretation
According to the inventor of the Mass Index, reversals may occur when a 25-period Mass Index rises above 27 or falls below 26.5.

Overview
Historical volatility is the log-normal standard deviation. The Historical Volatility Index is based on the book by Don Fishback, "Odds: The Key to 90% Winners".

The formula for a 30-day historical volatility index between 1 and 0 is: 
Stdev(Log(Close / Close Yesterday), 30) * Sqrt(365)

Some traders use 252 instead of 365 for the bar history that is used by the square root function. The Log value is a natural log (i.e. Log10).

Interpretation
High values of HVI indicate that the stock is volatile, while low values of HVI indicate that the stock is either flat or trending steadily.

Overview
The Money Flow Index measures money flow of a security, using volume and price for calculations.

Interpretation
Market bottoms may be identified by values below 20 and tops may be identified by values above 80. Divergence of price and Money Flow Index may be watched.

Overview
The Chaikin Money Flow oscillator is a momentum indicator that spots buying and selling by calculating price and volume together. This indicator is based upon Accumulation / Distribution, which is in turn based upon the premise that if a stock closes above its midpoint, (high + low) / 2, for the day then there was accumulation that day, and if it closes below its midpoint, then there was distribution that day.

Interpretation
A buy signal is generated when the indicator is rising and is in positive territory. A sell signal is generated when the indicator is falling and is in negative territory.

Overview
The Comparative Relative Strength index compares one vector with another.

Interpretation
The base vector is outperforming the other vector when the Comparative RSI is trending upwards.

Overview
Also known as Volume Price Trend. This indicator consists of a cumulative volume that adds or subtracts a multiple of the percentage change in price trend and current volume, depending upon their upward or downward movements. PVT is used to determine the balance between a stock's demand and supply. This indicator shares similarities with the On Balance Volume index.

Interpretation
The Price and Volume Trend index generally precedes actual price movements. The premise is that well-informed investors are buying when the index rises and uninformed investors are buying when the index falls.

Overview
The Positive Volume Index puts focus on periods when volume increases from the previous period.

Interpretation
The interpretation of the Positive Volume Index is that the majority of investors are buying when the index rises, and selling when the index falls.

Overview
The Negative Volume Index is similar to the Positive Volume Index, except it puts focus on periods when volume decreases from the previous period.

Interpretation
The interpretation of the Negative Volume Index is that well-informed investors are buying when the index falls and uninformed investors are buying when the index rises.

Overview
The On Balance Volume index shows a relationship of price and volume in the form of a momentum index.

Interpretation
On Balance Volume generally precedes actual price movements. The premise is that well-informed investors are buying when the index rises and uninformed investors are buying when the index falls.

Overview
The Performance indicator calculates price performance as a normalized value or percentage.

Interpretation
A Performance indicator shows the price of a security as a normalized value. If the Performance indicator shows 50, then the price of the underlying security has increased 50% since the start of the Performance indicator calculations. Conversely, if the indictor shows -50, then the price of the underlying security has decreased 50% since the start of the Performance indicator calculations.

Overview
The Trade Volume index shows whether a security is being accumulated or distributed (similar to the Accumulation/Distribution index).

Interpretation
When the indicator is rising, the security is said to be accumulating. Conversely, when the indicator is falling, the security is said to being distributing. Prices may reverse when the indicator converges with price.

Overview
The Swing Index (Wilder) is a popular indicator that shows comparative price strength within a single security by comparing the current open, high, low, and close prices with previous prices.

Interpretation
The Swing Index is a component of the Accumulation Swing Index.

Overview
The Accumulation Swing Index (Wilder) is a cumulative total of the Swing Index, which shows comparative price strength within a single security by comparing the current open, high, low, and close prices with previous prices.

Interpretation
The Accumulation Swing Index may be analyzed using technical indicators, line studies, and chart patterns, as an alternative view of price action.

Overview
Donald Lambert developed the CCI indicator. Although the purpose of this indicator is to identify cyclical turns in commodities, it is often used for stocks.

Interpretation
This indicator oscillates between an overbought and oversold condition and works best in a sideways market.

Overview
Author Welles Wilder developed the Parabolic SAR. This indicator is always in the market (whenever a position is closed, an opposing position is taken). The Parabolic SAR indicator is most often used to set trailing price stops.

Interpretation
A stop and reversal (SAR) occurs when the price penetrates a Parabolic SAR level.

Overview
The Stochastic Momentum Index, developed by William Blau, first appeared in the January 1993 issue of Stocks & Commodities magazine. This indicator plots the closeness of price relative to the midpoint of the recent high / low range.

Interpretation
The Stochastic Momentum Index has two components: %K (SMIK) and %D (SMID). %K is most often displayed on a chart as a solid line and %D is often shown as a dotted line. The most widely used method for interpreting the Stochastic Momentum Index is to buy when either component rises above 40 or sell when either component falls below 40. Another way to interpret the Stochastic Momentum Index is to buy when %K rises above %D, or sell when %K falls below %D.