What Is SMA?
The Simple Moving Average (SMA) calculates the arithmetic mean of closing prices over a specified number of periods. A 50-day SMA adds the last 50 closing prices and divides by 50. Each new day, the oldest price drops off and the newest is added, creating a smooth line that filters out short-term noise.
How SMA Works
Common SMA periods: 20 (short-term trend), 50 (medium-term trend), 100 (intermediate), and 200 (long-term trend). The 200-day SMA is the most universally watched level in all of financial markets. In crypto, the 200-week SMA has historically served as the bear market bottom — Bitcoin has never closed a weekly candle below its 200-week SMA on a sustained basis.
Why It Matters for Traders
While EMAs react faster to new data, SMAs give equal weight to all periods, which creates smoother, more stable levels. The 200-day SMA is often preferred over the 200-day EMA as a macro level because institutional traders, who often use SMA in their models, dominate at that scale. For most crypto swing traders, the 50 and 200 SMAs on the daily chart are essential levels to watch.
