Intermediate · Lesson 4 of 11 · 6 min read
How indicators work
Indicators are maths on past prices. They can make a chart easier to read, but they cannot see the future, and adding more of them rarely helps.
What an indicator really is
Every indicator takes the open, high, low, close or volume of past candles and turns them into a line, a band, a colour or a signal. A moving average, for example, is simply the average closing price of the last so many candles.
An indicator only rearranges information that is already on the chart. It is a way of seeing price more clearly, not a crystal ball.
Lagging and leading
Lagging indicators, such as moving averages, Supertrend and Parabolic SAR, confirm a move after it has started. They are late, but they keep you with a trend. Leading indicators, such as RSI and Stochastic, try to warn early that a move is stretched. They are early, but they are wrong more often, especially in strong trends.
The four families
| Family | What it measures | Examples on BTM |
|---|---|---|
| Trend | Which way price is heading | Moving averages, Supertrend, Parabolic SAR, Ichimoku |
| Momentum | How fast price is moving | RSI, Stochastic, MACD |
| Volatility | How much price is moving | ATR, Bollinger Bands, Daily Range Meter |
| Levels and volume | Where price has reacted before | Pivot Points, S/R Strength Levels, VWAP, Volume Profile |
Why more is not better
RSI, Stochastic and MACD are all built from the same closing prices, so when one says “overbought” the others usually agree. Seeing three of them agree feels like strong evidence, but it is really one opinion repeated three times. A crowded chart also makes it harder to see price itself.
A simple, balanced set: one trend tool (a 50 EMA) to show direction, one momentum tool (RSI) to spot stretched moves, one volatility tool (ATR) to size your stop, and price levels from support and resistance. Four tools, four different jobs.
This is also why BTM members can have up to 6 indicators and scanners on one chart at a time: a few well-chosen tools beat a wall of lines.
Settings and over-fitting
Changing an indicator’s settings until it would have caught every past move is called over-fitting. It looks perfect on old prices and then fails on new ones. Pick sensible settings, test them on plenty of history, and change them rarely.
Common mistakes
- Stacking several momentum indicators and treating them as separate signals.
- Trading every indicator signal without looking at the trend or key levels.
- Changing settings after every losing trade.
Check yourself
1. Is a moving average lagging or leading?
Lagging: it confirms a move after it starts.
2. RSI, Stochastic and MACD all say “overbought”. Why is that weaker evidence than it looks?
They are all built from the same closing prices, so they tend to agree with each other.
3. Which indicator could help you decide how far away to put your stop?
ATR, which shows how far price normally moves.
Try it on BTM
For education only, not financial advice. Trading carries a high risk of losing money, especially with leverage. Only trade with money you can afford to lose.
For educational purposes only. Nothing here is financial advice. Past performance does not guarantee future results, and trading carries a high risk of losing money, so only trade with money you can afford to lose. Read the risk warning.