A powerful trend-direction and trend-strength tool, highly configurable and with an average line and power markers.
In mathematical terms, the Z Score is the relationship of a piece of data to the "mean" value within a group of data items. On a chart, this can be thought of the position of the price of a bar compared to the recent n bars' mean value. This provides an easy-to-eyeball trend up/down indicator. If the indicator (default color red) is above zero, price is trending up, whereas if it is below zero then price is trending down.