..."try {parent.deselectBloggerImageGracefully();} catch(e) {}" href="http://www.sigmaforex.com/sigma-indicators/relative-strength-index.html">
Relative strength Index

Relative Strength Index (RSI) is a popular momentum oscillator developed by J. Welles Wilder.

The RSI indicator ranges in value from 0 to 100, with numbers above 70 indicating overbought conditions and fewer than 30 indicating oversold (Go long when RSI falls below the 30 level and rises back above it) or on a bullish divergence where the first trough is below 30.
If the RSI rises above 30, it is considered bullish, while if the RSI falls below 70, it is considered bearish (Go short when RSI rises above the 70 level and falls back below it
or on a bearish divergence where the first peak is above 70).

Sigma Charts

A chart or graph is a type of information graphic or graphic organizer that represents tabular numeric data and/or functions.
Charts are often used to make it easier to understand large quantities of data and the relationship between different parts of the data.
Certain types of charts are more useful for presenting a given data set than others.
The charts are one of the main interests at Sigma.
Charts are a statistically noticeably technical analysis tool for a trader that wants to carry out successful trading.
Currency charts bring clearly a single period of time and that period could range from one minute to one month to several years.