There is a bug in calculation of the SQ_MACD Signal.
Based on docs online EMA should be used here instead of SMA.
https://www.investopedia.com/terms/m/macd.asp
Subject changed from MACD indicator Multicharts bug to Bug in Multicharts Indicator SQ_MACD
Status changed from New to Refused
We could create a "standard" implementation of MACD (feature request, not a bug), but I don't see it as a big priority. Indicator computation in SQ matches the one in Tradestation/MultiCharts because we use custom function SQ_MACD, and so the strategy trading matches.
This is what matters most.