Constructing defended price lines from volume clusters

Isolate a volume-cluster

A relative-volume histogram can mark unusually large-volume sessions as a distinct state against ordinary volume bars. After a cluster of those large-volume sessions, a defended-price-line can be placed at the closing price. A two-bar large-volume cluster can be used as the construction trigger for that close-based line.

Flag restricted travel

A second construction compares a price move with the accompanying volume change over a lookback and flags when movement suddenly becomes restricted. That freedom-of-movement reading marks when travel becomes constrained relative to the volume change that arrived with the move.

Confirm and shift the line

Repeated support and resistance readings tend to stack near the same prices, and those tight stacks can be read as confirmation of a local level. When new confirming prints appear, the defended-price-line can be moved up or down to a single best-fit of the apparent local support or resistance zone.

Hide redundant neighbors

A proximity-filter can hide a new defended-price-line if its price sits inside a user-set tolerance of an older line that is already shown. A visible-origin-filter keeps only lines whose first print falls inside the current chart window. Restricting the plot that way removes many older lines that start off the left edge and still leaves congestion as more recent levels accumulate.