(BB) are a widely popular instrument created by John in the early 1980’s. consist of a band of three lines which are plotted in relation to security prices. The line in the middle is usually a ( ) set to a period of 20 days (the type of and period can be changed by the trader; however a 20 day moving average is by far the most popular). The then serves as a base for the Upper and Lower Bands which are used as a way to measure by observing the relationship between the Bands and price. Typically the Upper and Lower Bands are set to two standard deviations away from the (The Middle Line); however the number of standard deviations can also be adjusted by the trader.
Moving averages visualize the average price of a financial instrument over a specified period of time. However, there are a few different types of moving averages. They typically differ in the way that different data points are weighted or given significance. An ( ) is very similar to (and is a type of) a . The major difference with the is that old data points never leave the average. To clarify, old data points retain a multiplier (albeit declining to almost nothing) even if they are outside of the selected data series length.
The 3 EMAs that the Script has, are configured as follows:
There are other indicators in the Public Library that have similar functions to this Script, but they all do it in a more complex and less friendly way when configuring it, for this reason we wanted to keep this Script as simple as possible.
Siguiendo el verdadero espíritu de TradingView, el autor de este script lo ha publicado en código abierto, para que los traders puedan entenderlo y verificarlo. ¡Un hurra por el autor! Puede utilizarlo de forma gratuita, aunque si vuelve a utilizar este código en una publicación, debe cumplir con las Normas internas. Puede marcarlo como favorito para usarlo en un gráfico.