以下是google查找回来的
原文网址: http://u8881.com/discuz/thread-325323-1-1.html
ClickBank上的sale,refd,grav的意思
例: $/sale: $64.89 | %/sale: 50.0% | %refd: 82.0% | grav: 7.69
$/sale: $64.89 一个销售给你多少钱(每个销售会员获得的佣金)；
%/sale: 50.0% 一个销售给你的钱数占商品价格的百分数(佣金占商品价格的比例)；
%refd: 82.0% 这个商品有多少是来自会员推广；
grav: 7.69 评价这个商品相对有多少会员在推广 (商品的受欢迎程度，30以上就比较受欢迎，100以上就很好了)
原文:
$/sale: How much you are likely to earn based on sales from the previous two weeks. Refunds have already been factored in too, so it’s a great little metric. In fact, if you’re good a math then you’ll be able to do a little reverse engineering and figure out what the refund rate is of a product BEFORE you get involved.
%/sale: Simply the percentage commission you earn. Looking at $/sale is a better metric s you’ll get to see almost exactly how much you’ll earn per sale.
%refd: What percentage of sales were refereed by affiliates. The difference is direct sales — which I guess would be from the merchant (or ClickBank themselves when their tracking chooses not to work. Oops, did I say that out loud?)
grav: This is a kind of cryptic metric, but an important one never the less. The higher the number, the more affiliates are promoting it. It’s a good gauge as to how popular a product is and whether its selling or not. Anything between 30 – 100 is pretty popular. Less then 30 and it’s either new, or the market just isn’t that big. Above 100 identifies a very popular product.
