What is Simple Moving Average ?

Simple Moving Average is an analytic tool. A Simple Moving Average aims to crunch past data into a single number to crease out short-term volatility and gives traders an idea of the emerging trend. In other words, a Simple Moving Average helps traders get the signal from the noise. Below, we will understand what is SMA in trading.

Tracking every minute change in the stock price may not be very useful for all traders. Therefore, traders use the Simple Moving Average  to collapse a high volume of data into a single figure. Let’s understand how this is done by looking at the Simple Moving Average definition.

Most people are familiar with the term average, or mean. To calculate the average of ten numbers, we simply add all the ten numbers and divide the sum by ten. That will give us the average.

March 1st to March 10th of 2020 were a volatile 10 days for the stock market. If you want to cut through the volatility, you can add up the closing prices of all ten days and divide by 10. But to cut through the noise better, you can use a moving average. To calculate the moving average, find the average closing price from March 2nd to march 11th, march 3rd to march 12th, and so on. The graph line that will connect all these averages (that are moving across time) is called the moving average.

A Simple Moving Average is simply a moving average that gives equal weight to all the units in the range. A Simple Moving Average can be understood with greater clarity in comparison with an exponential moving average. We will break down the difference in the last section of the article.

How to calculate simple moving average

To calculate the Simple Moving Average, one must pick a range. 10 day SMA and 50 day SMA are quite regularly used by traders. Once the trader has picked a range, he needs to pick a time period whose Simple Moving Average he wishes to know. After the time period has been selected, the moving averages inside the selected range must be calculated, and plotted on a graph.

If the range is 10 days, like our example above, then the trader needs to figure out the moving averages of 10-day blocks. Once the moving averages have been plotted on a graph, a simple line can be drawn to connect the dots. That line is the Simple Moving Average. The direction and momentum of this line can give the trader insights that can inform his investing choices.

Short term SMA v/s Long-term SMA

A 200 day Simple Moving Average will be called a Long-term SMA, while a 50 day moving average will be called a Short-Term SMA. The relationship between short term SMAs and Long-term SMAs can reveal emerging trends as well.

For instance, if the Short-term SMA dips below Long-term SMA, then that could be an indication of a coming bear run. In the financial market parlance, this is known as a Death Cross.

If the opposite happens – that is, if the short-term SMA cuts through and rises above long-term SMA – then that could indicate a coming bull run. In the financial market parlance, this is known as a Golden Cross. Traders often chose to buy the stock whose prices show a golden cross as it indicates possible positive movement of stock prices in the near-future.

Variations to SMA

Weighted moving averages are a variation of Simple Moving Averages. Simple Moving Averages have an analytic flaw, which is that they assign equal value to each unit in the range. That is, in a 200 day SMA, the stock prices from 200 days ago will be assigned the same weight(weight as in mathematical significance) as the stock prices from yesterday. Certain traders look at this, and rightfully argue that recent stock prices should be considered more significant than prices from months ago. These traders prefer to use weighted moving averages, that give greater weightage to more recent values in the range.

Exponential Moving Averages are an example of weighted moving averages. EMAs give exponentially more weightage to stock prices as they get closer to the date of calculation.

Conclusion :

Simple Moving Averages is a useful tool in a trader’s investing toolbox. It can be used to throw light on the direction in which the future prices might move. Simple Moving Averages are also a useful beginner’s step before moving to more advanced tools like weighted moving averages.