What is MACD?
MACD (Moving Average Convergence Divergence) is a trend-following momentum indicator that shows the relationship between two moving averages of an asset's price. It's one of the most popular indicators in technical analysis.
Unlike RSI which measures overbought/oversold conditions, MACD identifies trend changes and momentum shifts — making it ideal for catching the start of a new move rather than betting on reversals.
MACD Components
- MACD Line — The difference between the 12-period and 26-period exponential moving averages (EMA). When this line is above zero, short-term momentum is bullish.
- Signal Line — A 9-period EMA of the MACD line. Acts as a trigger — crossovers between MACD and Signal generate trading signals.
- Histogram — The visual difference between the MACD line and Signal line. Growing bars = strengthening momentum. Shrinking bars = weakening momentum.
- Zero Line — When MACD crosses above zero, the short-term trend is bullish. Below zero = bearish.
Why MACD Works for Polymarket
- Catches trend starts — MACD crossovers often signal the beginning of a new price move — perfect for prediction markets where you need to be right about direction.
- Works on all timeframes — Effective on 5-minute (BTC), 15-minute and 1-hour charts, matching Polymarket's resolution windows.
- Clear, objective signals — Crossovers are binary — MACD is either above or below the signal line. No ambiguity.
- Histogram shows conviction — The histogram tells you how strong the momentum is, helping you size positions appropriately.
The Strategy
Bullish Signal (Buy YES)
- 1MACD line crosses above the Signal line
This is the primary bullish signal — short-term momentum is accelerating upward.
- 2Confirm with histogram
The histogram should be turning from negative to positive (bars growing above zero).
- 3Buy YES shares
On "price above" markets where the strike is near or below the current price.
Bearish Signal (Buy NO)
- 1MACD line crosses below the Signal line
Short-term momentum is decelerating — price may fall.
- 2Confirm with histogram
Histogram should be turning from positive to negative.
- 3Buy NO shares
On "price above" markets where the strike is near or above the current price.
Reading the Histogram
The MACD histogram is your best tool for gauging momentum strength:
Growing Green Bars
Bullish momentum is accelerating. MACD is pulling further above the signal line. Strong conviction for YES trades.
Shrinking Green Bars
Bullish momentum is fading. MACD is converging back toward the signal line. Consider taking profits.
Growing Red Bars
Bearish momentum is accelerating. Strong conviction for NO trades.
Shrinking Red Bars
Bearish momentum is fading. A bullish crossover may be imminent.
Risk Management
- 1Wait for confirmation
Don't trade on the first tick of a crossover. Wait for the bar to close to confirm the signal.
- 2Size based on histogram strength
Larger histogram bars = stronger momentum = larger position. Small bars = small position.
- 3Avoid choppy markets
When MACD is flat near the zero line with frequent crossovers, the market is ranging. Stay out.
- 4Use 1-hour markets for MACD
MACD is a lagging indicator. It works better on 1-hour markets where trends have time to develop.
Automating MACD with Playground
MACD strategies are ideal for automation because the signals are objective and rule-based. In the Polyblock Playground:
- 1Open the Playground
Navigate to the Playground from the main menu.
- 2Describe your strategy
Tell the AI: "Buy YES when MACD crosses above signal line on BTC 1-hour markets. Size $15 per trade. Hold to resolution."
- 3Review the configuration
The AI builds a structured strategy with all parameters. Adjust as needed.
- 4Deploy
Activate the strategy and it trades automatically 24/7.
Combining MACD with RSI
The most powerful approach is combining MACD (trend/momentum) with RSI (overbought/oversold):
- MACD for direction — Use MACD crossovers to determine whether to trade YES or NO.
- RSI for timing — Wait for RSI to reach extreme levels before entering. This filters out weak MACD signals.
- Example combo — Buy YES when MACD crosses bullish AND RSI is below 40. Buy NO when MACD crosses bearish AND RSI is above 60.
