We have composed a PDF file discussing the differences between the values output from NST for its Stochastic indicators versus the outputs of Stochastic indicators from other programs, specifically TradeStation. You can view the document at Stochastics.pdf
There are also two indicators that go along with the PDF file. You can download them from Stochastics.zip. Unzip the contents of the zip file to you NeuroShell Trader 6/Template directory and restart NST if it was running for the indicators to be accessible from the Indicator Wizard.