The analysis on S&P 500 mini futures.Just before began changing from DEC`08 contract to MAR`09. On tis chart you can see 3 previous weeks, and prices with max volumes per week.
Dark blue is the week from 1 to 7.12 with max volumes 834/835/844,5
Red week - 24-30.11 formed volumes on the 849-850 prices.
Volumes of two weeks in a narrow range.Huge volume is formed in the bottom.That pushed the market higher.
Yellow week (8-14.12) opened above this large volume that means the market is in a "buy zone".But for 3 days from monday to wednesday, unusually big volume appeared on 898/898,25/898,50.153491 lots for 3-4 days.That is about 540 million dollars only on one price.Must be a strong movement.And we have to join it
Thursday the market gave intraday deal from that price: market rebounded from 898 and went under intraday volumes.Big players reversed the market to the levels of previous weeks.
On the chart 870 and 869 are max volumes for all the contract.



On this chart you see how happened a sell-deal from 898 level, with rebound from that price.



Here are all intraday volumes with interval of 1 hour.Max volumes are coloured-we see how was fomed volumes for selling.



This are max volumes per week.



Dec08 contract was quite volatile wiht not as big volumes as it was in previous, but it wasn`t a problem for trading.