Unless you have a past history of certain things going wrong then serial BHCG is unneccessary. But like you said its reassurring to see it rising. After a certain gestation though it starts decreasing so only recommended in early pregnancy. I think it can start decreasing as early as 8weeks and this is normal doesn't indicate pregnancy loss is going to occur. It usually peaks at 8-10weeks and then starts declining.
As for the tickers you have to add them in your signature. Not good at expalining but I am sure someone else will.