Studies · Moving-average oscillators
Coppock Curve
coppock · Coppock Curve — a WMA of two percent rates of change, summed
Drawn in its own panelReads one column (close here)Guide lines at 0
Hover the chart to read values · practice data: a seeded random walk with no overnight gaps
What it measures
Adds a 14-period and an 11-period percent rate of change together and smooths the sum with a 10-period weighted moving average. It was designed on monthly data to spot the bottoms of major stock-market declines.
How traders use it
- The classic signal is a buy when the curve turns up from below zero, read on a monthly chart of a broad index. Some versions wait for it to cross back above zero instead.
- It was never intended as a sell signal; some traders use a downturn from above zero, but that is not the original rule.
Parameters
| Name | Value | Default | Allowed | What it does |
|---|---|---|---|---|
| longPeriod | 14 | ≥ 1 usual 8–24 | The longer rate-of-change look-back. Coppock used 14 months. | |
| shortPeriod | 11 | ≥ 1 usual 6–20 | The shorter rate-of-change look-back. Coppock used 11 months. | |
| wmaPeriod | 10 | ≥ 1 usual 5–20 | Length of the weighted moving average that smooths the sum. Coppock used 10. |
Good to know
The periods are counted in bars, so on daily data 14 means 14 days, not 14 months. To read it the classic way you need monthly bars.