This script serves as a trend-following indicator by combining Bollinger Bands with Exponential Moving Averages (EMA). Here's a detailed explanation of how it works:
Calculating EMAs (Exponential Moving Averages):
The script computes four EMAs with different periods: 9, 13, 18, and 25. These EMAs are represented by the red, orange, yellow, and green lines respectively on the chart.
Calculating Bollinger Bands:
Users can specify the length of the Bollinger Bands and the type of moving average to use (SMA, EMA, etc.).
The script calculates the moving average (basis) using the 'ma' function, which accepts the specified moving average type and length.
It then calculates the standard deviation (dev) by multiplying the standard deviation of the source by the specified multiple (mult).
The upper Bollinger Band (upper) and lower Bollinger Band (lower) are calculated by adding and subtracting the standard deviation of the moving average from the source.
The Bollinger Bands are plotted on the chart along with the basis line, and the space between the upper and lower bands is filled.
Customizable Parameters:
Users can adjust the length of the Bollinger Bands, the type of moving average used, and the multiple of the standard deviation.
They can also specify an offset to adjust the position of the Bollinger Bands on the chart.
In summary, this script allows visualization of EMAs to identify short, medium, and long-term trends, along with Bollinger Bands to assess price volatility and overbought or oversold levels. This combination can assist traders in making informed trading decisions by identifying potential entry and exit points in the market.