When looking at small time frame charts it is very good to look into daily moving averages to find support and resistance. And also to find 8/21 crossover it is good to have 8 and 21 days moving averages on the minutes’ chart.
To have 8/21 days moving averages in minutes chart first we have to have a number of periods to be calculated to enter in the Moving average values.
There is a total of 6.5 hours of trading in each trading session so we have divided the periods into different smaller time frames in the below table:
You have to enter 208 period MA in 15-minute chart to plot 8 days MA and 546 period MA in 15 minute chart to plot 21 days MA and so on.