Public Heel's answer to your query is correct. At one time a long time ago, Thompson's had a good idea and used its information to make those charts showing buy and sell interest. As soon as a lot of folks began to follow the information there, "da boyz" figured out how easy it was to put out false buy and sell orders or "expressions of interest" which are immediately pulled if they ever get in danger of getting filled.
Hedge funds, etc. play Thompson's like a fiddle and its only value now is that it is a fairly reliable contrary indicator for a lot of stocks.
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