RSI dijelaskan: momentum, divergensi, dan mitos 70/30

Relative strength index mengukur kecepatan pergerakan harga. Begini cara membacanya dengan benar — dan mengapa “jual di 70” adalah oversimplifikasi termahal di trading retail.

Diperbarui July 2026 · 9 menit baca

Apa yang sebenarnya diukur RSI

RSI compares the average size of recent up-moves against recent down-moves and compresses the result into a 0–100 scale. Above 70 is conventionally “overbought”, below 30 “oversold”. What it really measures is momentum — how one-sided the last N bars have been.

RSI = 100 − 100 / (1 + avg gain / avg loss)

PriceRSI 14Overbought 70Oversold 30

Harga dengan RSI 14 di bawah — pita gelap adalah zona netral 30–70. · Illustrative data — past performance is not a reliable indicator of future results.

Mitos 70/30

In a strong uptrend, RSI can sit above 70 for weeks while price doubles. Selling the first overbought reading is how traders short the strongest markets on the chart. Overbought means the move is fast — it does not mean the move is over.

Rule that survives contact with real markets: in an uptrend, treat RSI dips toward 40–50 as pullback buy zones. Reserve the classic 70/30 reversal reading for ranging markets.

Divergensi — sinyal bernilai tertinggi

When price makes a new high but RSI makes a lower high, the move is running on fewer participants — bearish divergence. New price low with a higher RSI low is bullish divergence. Divergences don't time the turn precisely, but they flag exhaustion earlier than any crossover.

Confirm divergence with structure: wait for the trendline or last swing to actually break.
Higher timeframes produce more reliable divergences than 1-minute noise.
Combine with the 50-EMA trend filter to avoid counter-trend knife-catching.