When My Most Reliable Indicator Went Silent
By Ramesh Ramaswamy · Edited by Meenakshi Ramesh · · 2 min read
For years, I had an indicator I trusted almost blindly.
It had survived bull markets, bear markets, geopolitical shocks and countless hours of chart watching. Over time, I stopped treating it as an indicator and started treating it as a trusted companion.
Then something strange happened.
One day, the market was moving. Momentum was obvious. Volume was present. Price was advancing rapidly.
I waited for my trusted indicator to speak.
Nothing. No signal. No confirmation. No warning. Just silence.
At first, I thought the indicator had failed. Then I realised something far more interesting: the indicator hadn't failed; I had misunderstood its job.
The hidden assumption behind every indicator
Most traders assume that a good indicator should work in all markets.
But indicators are not universal. They are built upon assumptions.
- A Bollinger Band assumes something different from a trend-following moving average.
- A VWAP assumes something different from a momentum oscillator.
- A regression channel assumes something different from a volume profile.
Every indicator is quietly saying: "I work best when the market behaves in a particular way."
The problem appears when the market changes regime.
Why the market regime comes first
Imagine a strongly Gaussian market. Price oscillates around the mean. The statistical boundaries matter. Sigma bands matter. Mean reversion dominates.
In this environment, trend indicators frequently disappoint because the market itself does not permit trend persistence.
Now imagine an expansion regime. Participation increases. Volatility expands. Price begins accepting movement beyond traditional statistical expectations.
Suddenly the same trend indicator comes alive, while mean-reversion indicators become increasingly ineffective.
| Gaussian market | Expansion regime | |
|---|---|---|
| What price does | Oscillates around the mean | Accepts movement beyond traditional statistical expectations |
| What matters | Statistical boundaries and sigma bands | Rising participation and expanding volatility |
| Trend indicators | Frequently disappoint | Come alive |
| Mean-reversion indicators | Dominate | Become increasingly ineffective |
Nothing changed in the indicator. The environment changed.
The lesson: the question the market asks first
The market does not ask: which is your favourite indicator?
Rather, the market asks: which environment are you trading in?
Only after answering that question can an indicator be interpreted correctly.
So what do you do with that answer? In Blog 9, The Workflow That Changed My Thinking, I set out the layers I now work through, starting with the environment.
Frequently asked questions
Why does a reliable indicator suddenly stop giving signals?
Usually the indicator has not failed; the market has changed regime. Every indicator is built on assumptions about how the market behaves. When the market stops behaving that way, the indicator goes quiet or gives poor signals, even though nothing in the indicator itself has changed.
What is a market regime?
A market regime is the environment price is moving in. Four are used here: Gaussian (price oscillates around its mean), transitional, expanding (participation and volatility rise and price accepts moves beyond normal statistical limits) and panicked.
Why do trend indicators disappoint in a range-bound market?
In a strongly Gaussian market, price keeps returning to its mean and the market does not allow a trend to persist. Sigma bands and mean reversion matter more there, so a trend-following indicator has little to work with.
Why do mean-reversion indicators fail in an expansion regime?
In an expansion regime, participation increases, volatility expands and price begins accepting moves beyond traditional statistical expectations. Price no longer snaps back to the mean, so tools built on that assumption become increasingly ineffective.
What should I ask before trusting an indicator?
Which environment am I trading in? Only after answering that question can an indicator be interpreted correctly.
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