Category
MultiBar Functions
Description
Exponential Moving Average
Syntax
EMA(expr, count) or XAvg(expr, count)
Parameters
expr  data series formula
count  lookback period
Notes
Either EMA or XAvg can be used as the name of this function.
Count is usually thought of as an integer representing a number of bars, but can actually be any decimal value. An EMA is constructed by multiplying each difference between the result so far and the next value by a factor equal to 2 / (count + 1).
Note that, like most other backtesting software, RealTest begins each EMA calculation with MA(expr, count), then begins to apply the EMA weighting for subsequent bars once count has been reached.
This function supports onepass calculation when used in the Data Section with a nonvariable count.
