contracts for difference, page-28

re: contracts for difference aussie 200 v spi I have been trading CFDs for quite some time and dont understand the relationship between AUSSIE 200 and the SPI particularly premarket and after market.

I notice premarket the index price anticipates the final opening price but can be in arrears by a large amount - so much so that stops can be easily taken out and the market move rapidly in the opposite direction, very frustrating.

Si ilarly after market upt to 4:30, like today market retraced 50

I cant montor the SPI realtime - so question:

Is this marketmaker activity or mirroring the SPI?

Ted