I'm not a subscriber to MRCI, but I see their work a lot. I think they do a good job selecting spreads, and displaying the spread in a pretty accessible way. The charts are made using historical data over 20 years, with the dates moved around a bit to account for weekends/holidays being on different dates each year. They then construct a chart of the average movement throughout the year of a spread.Quote from lifegauge:
Hello and thank you for sharing your spreads trading journal. I have a question if you do not mind - What do you think of the seasonals research done by MRCI and do you actually understand how those charts are being constructed?
There are a few other calendar spreads that MRCI apprently does not have, so I wonder for those particular spreads ... how else can we try and find the seasonalities.
To look for seasonality: You can for instance use www.scarrtrading.com (it's free right now). Load up the May and Jul wheat for example, and look at the pattern. From this you can construct your own spreads

There are a couple of webpages which allows you to hunt for seasonality with databases - seasonex.com is one of them.
I'm currently for this journal using trades planned after reading the Encyclopedia of Commodity and Financial Spreads which you can buy off Amazon.