The TD Setup Trend (TDST) indicator—displayed as a green or red dotted line—is derived from the initial count of the Setup indicator. It helps confirm market trends and identify potential trend failures.

TDST establishes reference levels based on the lowest true low and highest true high from recent price action. These levels serve as key areas of support and resistance, offering valuable insight into the strength and sustainability of a market's price movement.

Some traders use those lines as SL, but it is rather used to open a trade once a perfected 9 or 13 are close to the dotted line.

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Once a dotted line turns solid it indicates that a resistant is confirmed broken and now resistance, and further price movement fill follow.

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