I always assumed that the technical-analysis tag referred to technical chart analysis, i.e. the prediction of future BTC exchange rates based on chart patterns and the psychology of trading. However, it seems to be used as a substitute for the technical tag, i.e. analyzing the technical behavior of the Bitcoin protocol or Bitcoin client.
There is no wiki tag, so I am not sure if my interpretation is correct. Before I added any wiki text or did any retagging, I wanted to ask meta for the consensus opinion on its meaning.