For Australia’s most active share market participants, precision and speed are everything. The Intraday Momentum Index (IMI) is rapidly becoming a must-have indicator for day traders who want to turn short-term market swings into real opportunities. But what exactly is the IMI, and how does it fit into today’s fast-evolving trading landscape?
What Is the Intraday Momentum Index?
The Intraday Momentum Index, or IMI, was developed by market technician Tushar Chande to combine the strengths of the Relative Strength Index (RSI) with the unique demands of intraday trading. While the RSI is familiar to most traders, the IMI specifically measures the ratio of up closes to down closes within a single trading day, factoring in both the size and direction of price movements. The result? A sensitive gauge that helps traders pinpoint overbought and oversold conditions on short timeframes — perfect for the Australian Securities Exchange (ASX), which has seen a surge in retail day trading activity since the pandemic and through 2025.
- Formula: IMI = 100 × (Sum of up closes over n periods) / (Sum of all up and down closes over n periods)
- Typical Look-back Period: 14 days (but many ASX day traders use shorter periods for high-volatility stocks)
Why the IMI Is Gaining Traction in 2025
Australia’s trading environment has shifted. With the ASX 200 hovering near all-time highs and tech-driven platforms like SelfWealth and Stake making real-time data accessible to everyone, intraday volatility has become a playground for nimble traders. Here’s why the IMI is standing out in 2025:
- Responsive to Volatility: The IMI reacts quickly to price surges and drops, often providing signals before traditional indicators like RSI or MACD.
- Works in Both Directions: IMI helps identify both bullish and bearish reversals — a critical edge during the frequent intraday swings seen in sectors like mining and tech.
- Regulatory Adaptation: With ASIC tightening rules on leverage and CFDs, more traders are shifting to direct equities trading, seeking reliable tools like the IMI for short-term setups.
Real-World Example: In May 2025, Zip Co (ASX: ZIP) experienced a 12% intraday drop after a surprise earnings miss, only to rebound 7% within hours. Traders watching the IMI spotted the oversold signal just as buyers stepped in, capturing a sharp reversal that RSI flagged too late.
How to Use the IMI for Smarter Intraday Trades
Understanding the IMI is one thing — using it for actionable trades is another. Here’s how savvy Australian day traders are putting it to work:
- Set Overbought/Oversold Levels: For the IMI, readings above 70 often signal overbought conditions (potential sell zone), while below 30 indicates oversold (potential buy zone). Adjust these thresholds based on the volatility of the stock or sector.
- Combine with Volume and News: IMI signals are most powerful when confirmed by a spike in trading volume or a market-moving announcement. Many traders now use IMI alongside live news feeds and ASX announcements for real-time validation.
- Shorten the Look-back for Faster Trades: On high-flyers like lithium stocks or fintechs, traders are using 5–7 period IMI settings to capture even quicker reversals.
Pro Tip: The IMI isn’t a magic bullet. It’s most effective when combined with price action analysis and risk management strategies. Many trading platforms popular in Australia now offer IMI overlays, making it easy to integrate into your existing toolkit.
IMI in the Context of 2025’s Trading Rules and Tech
Recent policy changes and tech advances are shaping how indicators like the IMI are used:
- ASIC’s Real-Time Reporting: With tighter reporting requirements and greater transparency, the quality of intraday data has improved, making IMI readings more reliable.
- AI-Powered Trading Platforms: Many Australian brokers are rolling out AI features that highlight IMI signals and backtest their effectiveness — a big leap for retail traders in 2025.
- Tax and Compliance: More frequent trading means stricter ATO reporting for short-term capital gains. IMI can help traders be more selective with entries and exits, potentially reducing unnecessary trades and tax headaches.
Conclusion: Should You Add IMI to Your Trading Toolkit?
The Intraday Momentum Index isn’t just another technical indicator — it’s a precision instrument designed for today’s hyperactive markets. For Australian day traders navigating a landscape of increased volatility, tighter regulations, and smarter trading platforms, the IMI offers a measurable edge. Whether you’re chasing the next lithium breakout or managing risk in blue chips, understanding and applying the IMI could be the difference between catching the move or missing it entirely.
