reading a sloping green is tricky and takes practice,i use the grid lines as a guide depending on how severe the slope is,also with practice try stopping the meter after the centre line ,this will help to straighten out the putt,as for the speed of the greens,on tournament greens i use a 50 40 30% method ,10 foot down hit it 5. standard greens are slow so you can give them a go,they wont roll past a lot.different courses have slightly different speeds practice practice ,practice