Elder Ray Index Strategy: Mechanics, Signals, and What the Data Shows

What the Elder Ray Index measures

The Elder Ray Index breaks price action into two components anchored to an exponential moving average (EMA). Bull Power is the distance between the period high and the EMA; Bear Power is the distance between the period low and the EMA. A positive Bull Power reading means buyers drove price above the trend baseline. A negative Bear Power reading means sellers pushed price below it.

The EMA serves as the estimated fair-value anchor. Elder designed the system so that you read the EMA for direction first and use the two power bars only for confirmation. Bull Power and Bear Power on their own tell you about force; they tell you about opportunity only when the EMA agrees with the trade direction.

Standard Elder Ray strategy rules

The classic long setup requires three conditions to line up: the EMA is rising, Bull Power is positive and increasing, and Bear Power is negative but recovering toward zero. The short setup inverts each condition. The logic is that you want to buy when bears are losing their grip — not when they are tightening it.

Divergences between price and the power bars are a widely used secondary filter. If price prints a new high but Bull Power does not follow, buyers are running out of reach. If price makes a new low but Bear Power fails to deepen, the selling is thinning. Many practitioners treat these divergence signals as exit cues rather than entries, which keeps the position size of the indicator modest inside a larger system.

What 660,005 backtests say about oscillator-based strategies

IndicatorEdge tested 382 indicators across 903 assets on 1-Hour, 4-Hour, Daily, and Weekly timeframes — 660,005 backtests total, each run with realistic transaction costs. Only 26% of all indicator-and-asset combinations beat a passive buy-and-hold over those out-of-sample periods. That base rate applies to every oscillator-style system, including EMA-anchored power tools like Elder Ray.

High win rates are a specific trap to watch for. Several oscillators in this database — including CCI, DeMarker, and RSI mean-reversion variants — post win rates above 71% in raw signal counting, yet only 8–11% of the assets where they were tested actually beat buy-and-hold on a risk-adjusted basis. Win rate and genuine edge are not the same thing. Elder Ray shares structural similarities with those tools: it generates frequent signals off an EMA, which makes it easy to overfit and easy to mistake noise for pattern.

EMA-based trend systems do appear among genuine top performers in this dataset — EMA 100 Trend ranks in the top five for both the Index and Index ETF asset classes — but those are slower-moving trend-filter applications, not oscillating power-bar readings. The distinction matters when you are deciding how to apply any EMA-derived tool.

These results are hypothetical — not financial advice

Every result cited on IndicatorEdge comes from historical, out-of-sample backtests run with realistic costs. Past backtest performance does not guarantee future results. Nothing on this site is financial advice. Whether any strategy is appropriate for you depends on your own risk tolerance, capital, and circumstances — that judgment is yours to make, not a backtest's to make for you.