Gasoil Calendar Spreads

Hi guys,

I have been trying to trade quoted 1,2,3 month gasoil calendar spread and their fly. They look like either they follow technicals pretty well but they have been pretty directional lately. Any reasons on why that might be happening? Any tips on what technical indicators or fundamentals to be looked at identify disparity in calendar outrights and whether the disparity is going to increase or its going to average out?

Thanks