The ADX is an indicator of trading widely used, which is a mathematical formula that represents the strength of a trend, it is an indicator widely used in trading.

It was developed by Welles Wilder to determine the upward force and downward so combining the + DI and -DI.

The + DI and -DI indicate bullish direction downward direction.

Above 30 to 40 it represents a strong tendency and below 20 a weak trend.

The ADX is the result of dividing the + DI and -DI / on the sum of them, result between 0 and 100.