Not Bottom
Indeed it looks like the STI has not reached a bottom yet. The recent uptrend has three little subwaves which makes it a corrective wave. Thus it is labelled as Minor Subwave iv (black). The STI is expected to go down further next week, get support at the 3040 line and rebound. That will be the real bottom, which would be the end of Minor Subwave v (black), the end of Subwave 5 (black) and the end of Wave C (red).