Smoothing Period
The number of periods an indicator averages over, controlling how much noise it removes and how much it lags.
Formula
Test: increasing the smoothing period reduces the variance of the indicator's output and increases its lag
Unit
days
In depth
Every indicator's behaviour is dominated by this single parameter, and changing it changes every signal the indicator has ever produced — which is why period selection is where backtesting most easily becomes curve-fitting. There is no optimal value, only a trade-off: shorter periods respond faster and produce more false signals, longer ones the reverse. Standard settings such as 14 for RSI or 20 for Bollinger Bands are historical conventions from the era of hand calculation, not results of optimisation. A parameter that must be re-tuned for each security is a warning sign about the strategy, not a feature.
Worked example
An RSI computed over 7 periods might cross 70 on 40 occasions in a year, while the same series over 21 periods crosses it 8 times. Identical prices, five times the signal count — the parameter, not the market, produced the difference.
Illustrative figures, chosen so the arithmetic is easy to follow. Not a live price and not a valuation of any company.
Educational reference only
This entry explains what “Smoothing Period” means. It is not investment advice and not a recommendation to buy or sell any security. Any numbers above are illustrative, not live prices, and nothing here predicts price direction or rates a stock. Consider your own circumstances and consult a SEBI-registered investment adviser before acting.