Positive Volume Index
Cumulative indicator that changes only on days with volume higher than the previous day. The Positive Volume Index (PVI) accumulates price change only on days when volume is higher than the previous day. According to Fosback’s theory, uninformed participants are active on high-volume days, and PVI tracks their actions. Together with NVI it is used to assess “smart” and “uninformed” money.
Formula:
If Volume > Volume_prev: PVI = PVI_prev * (1 + (Close - Close_prev) / Close_prev)Else: PVI = PVI_prevTriggers
Section titled “Triggers”| Trigger | Direction | Condition | Description |
|---|---|---|---|
| Level cross up | 🟢 Buy | The indicator value crossed the specified level from below. | The PVI line crosses the configurable level Level from below. Level is set in the trigger parameters. |
| Level cross down | 🔴 Sell | The indicator value crossed the specified level from above. | The PVI line crosses the Level level from above. Level is set in the trigger parameters. |
| Value above level by N | 🟢 Buy | The indicator value rose above the level by the specified distance. | The PVI line crosses the Level + Distance mark moving upward. The distance delays entry until a confirmed level breakout. |
| Value below level by N | 🔴 Sell | The indicator value fell below the level by the specified distance. | The PVI line crosses the Level − Distance mark moving downward. |
| Value rising | 🟢 Buy | The indicator value is rising relative to the previous bar. | The PVI line is higher on the current bar than on the previous one — upward momentum. |
| Value falling | 🔴 Sell | The indicator value is falling relative to the previous bar. | The PVI line is lower on the current bar than on the previous one — downward momentum. Fires on every declining bar. |
| Slope turns positive | 🟢 Buy | The indicator’s slope turned positive — an upward reversal. | The PVI line changes its slope from downward to upward — the indicator stopped falling and started rising. |
| Slope turns negative | 🔴 Sell | The indicator’s slope turned negative — a downward reversal. | The PVI line changes its slope from upward to downward — the indicator stopped rising and started falling. |
Trigger parameters
Section titled “Trigger parameters”| Parameter | Type | Default | Range / Values |
|---|---|---|---|
Distance (Value above level by N, Value below level by N) | float | 0 | 0> |
Level (Value above level by N, Value below level by N, Level cross up, Level cross down) | float | 0 |
