change in volume and sentiment?

Yesterday or the day before there was a turnaround in sentiment I believe. The sell side volume has decreased substantially. It has been in the 5m-6m range and higher over a number of months but several million of that disappeared over the last 2 days and the ratio of buy side to sell side volume is the best it has been for a long time at around 1:2. Some "insistent" buying last few days also which is encouraging.

Back at 69 as we speak which is also encouraging. Why wouldn't Mr Santos for instnace buy more at these prices I ask given all their "inside information".

H