Beginner question here.
Here's my scenario.
I want to setup an automated buy of a stock.
It is currently trading at 10
I want to buy 1000 units when it reaches 8 and and stop buying if it reaches 9. But I don't want to have an 'all or none'.

Also, how do I know how many lots it will execute? I don't want to have 10 orders of 100 units because that would increase my transaction costs.

Ron.