same CRT

What is CRT? Cathode Ray Tube?

As for high fluctuations, it can be due to low number of visitors, low number of page impressions, low number of clicks, along with hundreds of other factors not related to you or your site.

Live with it, but if you can't, apart from high traffic, here's what worked for me: Do not fill every corner and white space on your pages with ad units, less ads per page contribute to a little more stability as well as higher Earnings Per Click EPC, test, and read this forum some more.
Good Luck

What you can earn from a single click on one Ad may vary from USD0.01 up to USD20.00 + (if you're very lucky - never seen more than USD2.00 myself)

eCPM is calculated from total earings and number of page impressions. So if, as you say - CTR and eCPM are the same - then the only difference is caused be slight changes in the actual number of impressions.

If your number of clicks per day is low (certainly if it is less than 100) your probably need to consider your results over a longer period to get anything meaningful

any good references here to read and get me started with better earnings?

thanks

Live with it, but if you can't, apart from high traffic, here's what worked for me: Do not fill every corner and white space on your pages with ad units, less ads per page contribute to a little more stability as well as higher Earnings Per Click EPC, test, and read this forum some more.

Do you actually mean the a lower page impressions but the same click number will give me a higher earning?

no, not lower impressions, less ads per page.

But isn't the page impressions the number of ads per page x the number of visits?

Isn't less ads per page = less page impressions :s

sorry for beeing dumm but i'm new

page impressions = number of pages your visitors view
ad impressions = number of ads your visitors view

Checkout the Glossary
[google.com...]

Also Optimization Essentials here
[google.com...]

Here's something else to remember: flucuations often decrease after new sites enter the AS market. Don't know why (could make a guess or two), but it does happen. Since yours is a new site, things will probably stabilize over time.

Thats not to say you won't see peaks and lows, just less of a magnitude.

Hobbs is giving you good help, which is typical of the fine people around here.

ditto.

I really don't know what to expect neither in terms of visitors nor in terms of revenue

read more. sometimes, we think all that hype about "easy Adsense money" applies to EVERYONE, but it doesn't. My first website (I thought it would be get a billion visits a day) made a total of $24.75 in its first year!

My main Adsense site now makes good (ok... better) money but it still fluctuates. Just read some of the threads today and you'll see - Adsense is prone to taking taking publishers on an earnings roller coaster ride every now and then.

In any case, welcome aboard and all the best!

is this normal

Yes. The Subway sandwich shop at my local park has earnings that fluctuate greatly. When it rains, they get hardly any customers. Towards the end of a baseball tournament, they may make more in a few hours than they make in some weeks.

That Subway shop has a high variance in their daily earnings, just like your website. You can download your last X days earnings in a comma separated variable (CSV) format that lets you import them into a spreadsheet, and then you can press a button that calculates the statistical definition of variance for you.

What does the variance tell you? It tells you whether to get worried (or excited) by a change in your earnings. Roughly speaking, any number less than twice your variance is not highly unusual. For example, if your mean earnings per day is $3 but your standard variance (looking back over the last 30 days, for example) is $1, then no point getting too excited if you make $5 tomorrow, or only $1 the day after that.

The overall Subway chain as a whole has much less variance in their earnings. In fact, their investors get upset if Subway can't predict pretty well what the next quarter's earnings will be. When you look at the total chain of Subway shops, they are getting traffic from many different places and many different kinds of customers. Thus, all the things that may make my local Subway have big variance (weather, a bus-load of hungry kids arriving, etc.) get averaged out.

Just like the Subway chain, if you start getting more traffic from a wider variety of sources, your variance will likely decrease as the causes of variance get averaged out. Thus, for stable earnings, you want both larger amounts of traffic and traffic from a wider variety of sources. One number you can watch to see whether you're getting closer to or further from that goal is the Google Stability Number [webmasterworld.com]

is this normal

Yes.