market depth

I've noticed no matter how small the trade is - it's enough to move the SP
I actually don't know if it is that whats moving it but every time I see movement I check the market depth in ETRADE and there is always 1 or 2 trades - but this time very small

Would be interesting to see what would happen if a big player came along

Not much work to be done today - so when bored I check up on RER!