John,
I use MACD divergence, if it forms around a key price level, (i.e. Support/resistance area/yesterdays high/low) as an aid to my main strategies. I don't keep any records as such as it is combined with other elements of my trading, but I would say it is definitely beneficial.
FYI I trade FX intraday.
As an example on todays cable chart, good positive divergence could be seen on the 15 min chart, from around 10 GMT to 16 GMT, resulting in a reasonable bounce.
HTH,
G
