Indicators have long been introduced to the trading systems of many traders. As a minimum, they are of good help in chart analysis, as a maximum, they are the base of the whole trading system. Algorithmic trading, which means automatizing the work and creating trading robots, is also mostly based on the signals of various indicators.
Momentum is one of the simplest and most popular indicators among traders. As its creator, certain sources name a French mathematician Paul Émile Appell. This indicator helps define the trend direction and the speed of the price change.
The Williams Percent Range (Williams %R) is an oscillator of the price movement speed showing the position of the current price in the range between the low and high of the previous periods. The indicator is drawn in a separate window under the price chart and consists of the main line %R and two areas: the overbought and oversold ones.
the ADX, or the Average Directional Movement Index, has not become as widespread as, say, the RSI. It is most likely due to the complexity of its formula; what is more, it is more of a trend indicator, and a beginner is seldom ready to trade large movements with large Stop Losses.
One of the most known and popular trading instruments on Forex are the Fibonacci levels (or lines). They appeared thanks to a famous Italian mathematician Leonardo from Pisa, better known by his nickname Fibonacci (son of Bonacci)
One of the most popular indicators (and, perhaps, the one that a trader first comes across starting their way on Forex) is the Moving Average (MA). The Moving Average belongs to the group of trend indicators and shows the average price of the chosen currency during a certain period of time.
The history of the Pivot Points indicator began in the early 30s of the twentieth century when a mathematician and a that-time famous trader Henry Chase decided to create an indicator meant for the security market. The synonym for a pivot would be a reversal, so a pivot point is a level on which the price reverses. So, the basis of the Pivot Point indicator is the idea that the market takes everything into account and repeats itself with time. The indicator was created in such a way that the opening and closing prices may serve as the support and resistance levels in the future.
The author of the Parabolic Sar is J. Welles Wilder. He first used it in 1976. In his book "New Concepts In Technical Trading Systems" Wilder presented several indicators: the Parabolic Sar, RSI, ADX.
Stochastic Oscillator chart is drawn in a separate window under the price chart and consists of two lines: %K, quick one, and %D, slow one. Its values vary from 0% to 100%; at the levels of 20% and 80% signal lines, defining the oversold (0-20%) and overbought (80-100%) areas, are drawn.
In the description of the indicator in the book "Bollinger on Bollinger Bands", it is said that the price remains at the borders of the lines 95% of the time and escapes those borders in 5 remaining percent. If volatility on the market is low, the upper and the lower lines are close to one the other, while the price is trading between them; the higher the volatility, the wider the channel formed by the three lines (pic 1). According to the classification, the Bollinger Bands are a trend indicator as it shows both flats and directed price movements. The timeframe may be anything from M1 to a year.