Using the SMI to Identify Overbought and Oversold Conditions in Volatile Markets

The Problem with Standard Levels in Volatile Markets

In a typical market, the +40 and -40 levels on the SMI serve as reliable indicators of overbought and oversold conditions. However, in a highly volatile market, the momentum swings are much larger. The SMI can easily push far beyond these levels and stay there, giving a premature signal.

• Example: During a strong panic sell-off, the SMI might plunge to -80 or even lower and remain there for an extended period as the price continues to fall. A trader who buys simply because the SMI is below -40 will likely suffer significant losses.

Adapting the SMI for High Volatility

There are two primary ways to adapt the SMI for volatile conditions: adjusting the overbought/oversold levels and modifying the indicator's settings.

1. Widen the Overbought/Oversold Bands

This is the simplest and often most effective adjustment. Instead of using +40 and -40, you can widen the bands to +60 and -60, or even +70 and -70 in extreme cases.

• New Rule: In a volatile market, only consider a security to be truly overbought when the SMI is above +60, and only consider it oversold when it is below -60. This requires a much greater momentum extreme before you start looking for a reversal, which helps to filter out the noise.

2. Lengthen the SMI's Lookback Period

Another way to make the SMI less susceptible to volatility is to lengthen its %K period. Instead of the standard 14, you could use a period of 20 or 30. This will make the indicator less reactive to short-term price swings and more focused on the larger, underlying momentum.

• New Settings: Consider using an SMI with settings like (21, 5, 5, 8) during periods of high volatility. This creates a much smoother, slower-moving indicator that is less likely to be whipsawed by erratic price action.

A Strategy for Trading Volatility with the Adapted SMI

This strategy is designed to find reversal points in a volatile market using the adapted SMI.

Entry Rules (Long Position):

1. Identify High Volatility: Use an indicator like the Average True Range (ATR) to confirm that the market is in a high-volatility state (e.g., ATR is significantly above its recent average).
2. Use Wider Bands: Adjust your SMI overbought/oversold levels to +60 and -60.
3. Extreme Oversold Condition: Wait for the SMI (14, 3, 3, 5) to dip below the -60 level.
4. Look for a Sign of Deceleration: Do not enter immediately. Wait for the SMI to start to "flatten out" or turn up from the extreme low. This shows that the selling momentum is beginning to wane.
5. Confirmation and Entry: Enter a long position only after the SMI line has crossed back above its signal line.

Risk Management in Volatile Markets:

• Wider Stops: Volatility requires wider stops. Place your stop-loss well below the recent swing low.
• Smaller Position Sizes: To compensate for the wider stop, you must use a smaller position size to keep your risk per trade at your standard level (e.g., 1% of your account).

Example Trade in a Volatile Market (Oil - WTI)

Here is a table illustrating a hypothetical trade during a period of high volatility in the oil market:

Conclusion

Trading in volatile markets can be profitable, but it requires a different approach than trading in normal conditions. By adapting your use of the Stochastic Momentum Index—either by widening the overbought/oversold bands or by lengthening the indicator's settings—you can filter out much of the noise and identify more reliable trading opportunities. The key is to be flexible and to adjust your tools to fit the market's personality. A rigid approach is doomed to fail when volatility strikes. By mastering these adaptive techniques, you can turn volatility from a threat into an opportunity. In our next article, we will put everything together and outline a complete SMI trading system.