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Williams’ Percent Range (%R) - indicator for MetaTrader 5

Williams’ Percent Range  technical indicator (%R) is a dynamic technical forex indicator, which determines whether the market is overbought/oversold. Williams’ %R is very similar to Stochastic Oscillator. The only difference is that %R has an upside down scale and the Stochastic Oscillator has internal smoothing.
To show the indicator in this upside down fashion, one places a minus symbol before the Williams Percent Range values (for example -30%). One should ignore the minus symbol when conducting the analysis.
Indicator values ranging between 80 and 100% indicate that the market is oversold. Indicator values ranging between 0 and 20% indicate that the market is overbought.
As with all overbought/oversold indicators, it is best to wait for the security’s price to change direction before placing your trades. For example, if an overbought/oversold indicator is showing an overbought condition, it is wise to wait for the security’s price to turn down before selling the security.
An interesting phenomenon of the Williams Percent Range indicator is its uncanny ability to anticipate a reversal in the underlying security’s price. The indicator almost always forms a peak and turns down a few days before the security’s price peaks and turns down. Likewise, Williams Percent Range usually creates a trough and turns up a few days before the security’s price turns up.

Williams’ Percent Range indicator

Below is the formula of the %R indicator calculation, which is very similar to the Stochastic Oscillator formula:
%R = (HIGH(i-n)-CLOSE)/(HIGH(i-n)-LOW(i-n))*100
  • CLOSE - today’s closing price;
  • HIGH(i-n) - the highest high over a number (n) of previous periods;
  • LOW(i-n) - the lowest low over a number (n) of previous periods.


AMkA - indicator for MetaTrader 5

Perry Kaufman's adaptive moving average with indicative (signal) points arrangement based on the standard mean-square deviation.
Signal points interpretation is as follows. In case the market goes flat, AMA indicator is placed horizontally and signal points are absent. In case there is a directional trend exceeding a mean-square deviation, a point of an appropriate color appears. That point is a signal for market entry or exit.
The following equation is used as a signal point positioning criteria:
AMA-AMA0 > StDev(AMA-AMA0,periodAMA)*dK
  • AMA-AMA0 - АМА last expansion;
  • StDev(AMA - AMA0, periodAMA) - indicator extensions' standard deviation for a period;
  • dK - external parameter.