Bollinger Bands +-3sigma.
You can change period and sigma ratio (Proper size of Deviation is 0.5~1.0).
Bollinger Bands Indicator (BB) is similar to Envelopes. The only difference is that the bands of Envelopes are plotted a fixed distance (%) away from the moving average, while the Bollinger Bands are plotted a certain number of standard deviations away from it. Standard deviation is a measure of volatility, therefore Bollinger Bands adjust themselves to the market conditions. When the markets become more volatile, the bands widen and they contract during less volatile periods.
This indicator finds the nearest neighbor by using a weighted correlation coefficient, in which more recent prices have larger weights. The weight decays linearly from newer to older prices within a price pattern.Price prediction by Nearest Neighbor
This indicator uses the Nearest Neighbor clustering technique, also called k-NN, to search for the most similar pattern in history and use its past prices as predictions of the current pattern future prices.
Now it's two-color (or two-mode) trend indicator, the number of calculated bars can be specified.The Moving Average Indicator, based on the Quasi-Digital Filter
The Moving Average indicator, based on the Quasi-Digital Filter. The MACD indicator as example of its use is presented.