What are you going to take legal action for? They never promised they would pull off the transaction. The team get a bonus payout in the event of completing a transaction and it is good for their CV
It is the typical ramp. Saying at 1430 is when the US market opens and it means we get a flurry of US buying. However what the rampers don't tell you is that the US traders don't start trading other markets when theirs open. They will be in two hours before the markets open just like the UK teams are...