Build 4.0.0.89 of xlsgen adds support trendlines to financial analysis tooling. Support trendlines are used in stock trading to delimit peer pressure for selling stocks.
Any time the stock data crosses the support line, this acts as a trade signal. The support line marks the signal for selling stocks, or for shorting stocks (i.e. buying on the prediction that stocks will go lower).
Support trend lines in xlsgen