I've been learning about MACD I was wondering if there a way to find all stocks that either converged or diverged yesterday?
Is there a tool available or would I have to model that myself?
Check out StockFetcher. It uses the concept of filters to allow you to run all kinds of queries against stocks - moving averages, MACD, stochastics, etc. I'm a paying member, but if I recall correctly, the free side allows you to run simple filters. The pay side allows you to save many more filters as well as test them historically.