Скрипт trading view базовый, нужно поправить код.

THIS IS THE BASIC INDICATOR (template) of the Trading View STRATEGY.
efinition:
The Bollinger Bands strategy is often used with the assistance of other indicators to make conceptual and strategic trading decisions. Bollinger Bands consist of three bands total: an upper band, middle band, and lower band. These separate bands are each used to highlight extreme prices in a specific security. The upper band is associated with overbought securities, whereas the lower band points to securities that are oversold, and the middle band acts as a moving average.  

It is common after a lower band has been broken by heavy selling for the price of the stock to revert back above the point of the lower band and move closer to the middle band. The Bollinger Bands strategy specifically profits from this type of occurrence - where the strategy demands for a close below the lower band. Therefore, it can be determined that buying the breaks of the lower Bollinger Band is a specific way that traders and analysts are able to take advantage of oversold conditions.
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Task: it is necessary that there is only one signal (for sale) according to the current strategy, without changing anything in it. But only to remove the buy signal.