RSI, MACD and Stochastic: Momentum Indicators Explained

Intermediate · Intermediate Path, lesson 4 of 15 · Trading · 7 min read · Published 19 Oct 2026 · Updated 19 Oct 2026

What RSI, MACD and the stochastic oscillator measure, how each is calculated, what overbought, crossovers and divergence really mean, and their limits.

A moving average tells you which way price has been going. Momentum indicators tell you how hard it has been pushing. They measure the speed of recent price changes, so they can show a trend gaining strength, running out of steam, or stretched further than usual. Three of the most popular are the RSI, MACD and the stochastic oscillator.

This lesson explains what each one measures, how it is calculated, the readings traders watch, and the traps that catch people who treat those readings as instructions. None of them predicts the future. They are different ways of summarizing price that has already printed.

See RSI readings on Markets

RSI: the Relative Strength Index

The RSI compares the size of recent up-moves with recent down-moves, usually over 14 candles, and scales the result from 0 to 100.

1. Work out the average gain and average loss over the period (losses as positive numbers).
2. Divide them: RS = average gain ÷ average loss.
3. Convert: RSI = 100 − 100 ÷ (1 + RS).

Readings at or above 70 are commonly called overbought, and at or below 30 oversold. Those labels only mean that one side has dominated recently. In a strong trend, RSI often spends long stretches in these zones. Many trend traders instead watch the 40–50 area in an uptrend, or 50–60 in a downtrend, as signs that a pullback has cooled off.

MACD: Moving Average Convergence Divergence

MACD is built from exponential moving averages, explained in Moving Averages (SMA/EMA). The standard settings are 12, 26 and 9:

• MACD line = 12-period EMA − 26-period EMA
• Signal line = 9-period EMA of the MACD line
• Histogram = MACD line − signal line

When the fast EMA pulls away from the slow one, the MACD line moves away from zero: momentum is building. When the two converge, it heads back towards zero.

Traders watch three things: the MACD line crossing its signal line, the MACD line crossing zero (the two EMAs crossing each other), and the histogram growing or shrinking. MACD has no fixed upper or lower bound, so "overbought" does not apply to it.

The stochastic oscillator

The stochastic asks where the latest close sits within the recent high-low range. A close near the top of the range scores near 100; near the bottom, near 0.

• %K = (close − lowest low) ÷ (highest high − lowest low) × 100, usually over 14 candles
• %D = a 3-period average of %K, used as a signal line

Readings above 80 are commonly called overbought and below 20 oversold. Because the stochastic reacts to every close inside a short range, it moves faster than RSI and gives more signals, including more false ones.

Divergence: when price and momentum disagree

Divergence is when price and an indicator point different ways. If price makes a higher high but RSI makes a lower high, the second push up had less force behind it; that is a bearish divergence. A lower low in price with a higher low in the indicator is a bullish divergence.

Divergence describes weakening momentum. It does not tell you when, or whether, price will turn, and in strong trends it can appear several times before anything changes. Traders who use it usually wait for price itself to confirm, for example with a break of a recent swing low, before acting.

Using momentum indicators with context

The indicators work best as part of a short checklist rather than as triggers.

1. Start with the trend

   Decide the direction on a higher timeframe first, as described in Multi-Timeframe Analysis. It tells you which momentum readings matter.

2. Look for momentum in the trend's direction

   In an uptrend, a pullback that drags RSI back towards 40–50 or turns the MACD histogram up again is more relevant than an "overbought" reading.

3. Confirm with price

   Look for price to react at a level or form a clear candle before acting. The indicator is the supporting evidence, not the reason.

4. Set your risk first

   Place your stop beyond the swing that would prove you wrong, size the trade from that distance, and enter both with the TP / SL switch.

Momentum readings on Traders Portal

The chart on the trade screen does not currently plot indicators. Momentum readings live on the Markets page:

• The quick view shows RSI (14, 1h) in its stats, and its Daily trend section shows RSI (14, daily) and whether the MACD (12, 26, 9) line is above or below its signal line.
• The Opportunity scanner lists markets under Oversold and Overbought (RSI 14 on hourly candles at or beyond 30 and 70) and Momentum. It labels itself as screens, not advice.

The stochastic is not shown on the platform. If you want full indicator panels, you can use a separate charting tool for analysis and place your orders on Traders Portal, checking that both show the same market and timeframe. Volume and Volatility covers the other family of indicators worth knowing.

Conclusion

RSI compares recent gains with recent losses, MACD tracks the gap between two EMAs, and the stochastic places the close within the recent range. All three measure momentum: how hard price has been pushing, not where it will go. Overbought and oversold zones describe stretched conditions that strong trends can sustain, and divergence warns of fading force without timing a turn. Read them in the direction of the trend, confirm with price, and keep your stop loss and position size fixed before every trade.

Topics: Indicators