Thin markets can be profitable for market makers as long as there is paper coming in off the floor. If wheat keeps moving, there will be paper.
Now about the volume figures. Calendar spread trading is very important in wheat which is something emini traders never do.
For example, if March 03 has a volume of 1,7K, then May 03 will probably have the same volume and that will be 80% of the total volume for that day. THAT is the market you are trading. You are trading the first TWO months. So when my excel spreadsheet that I uploaded says the combined volume was 8K, there would have been 3K in the front month and 3K in the second with 2K spread out in the later months.
That doesn't seem alot for the emini screen trader, yet the floor seems very busy and trades continuously during the active days. (During turns and at the close, the action on the floor is an outright riot.) On the slow days, some will do emini trading. Alot of the traders make markets in MW futures options or spread Mpls/KCT or Mpls/Chi.
There are mid 6 figure traders there and a number making from 60 to 80K a year. (Please don't chime in at this point with remarks about how that is not alot of money. There are many people here who would be happy to make that amount for a job that lasts 4 hours a day.) I know a guy who does well specializing in making markets in the out months. Talk about a thin market. His wife (another wheat trader) sometimes appears in the ET chat room.
With 5 to 8 cent typical intraday ranges (at $50 a cent), if you snag a handful of contracts and trade them for a good chunk of the daily range, you can do ok. Wheat has the capability of moving much, much more (esp if we enter a period of inflation in physicals). I know for bone or other arbs, this market is not large enough. But its a niche. A niche has certain protections, certain benefits and certain limits. For many, this market would be a good deal.
Here is a link where you can create Mpls Wheat charts and check out the intraday ranges. (Spring wheat MW is the contract that trades most actively at the MGEX.)
http://exchanges.barchart.com/intra/mgex/mcharts.htm