Well, these are my adsense stats for last few days: 58 clicks, $2.92 56 clicks, $5.11 80 clicks, $2.24 82 clicks, $5.62 75 clicks, $3.62 71 clicks, $9.62 72 clicks, $6.52 so far today.. Why so low earnings for a few days when the number of clicks remain almost the same? And the ecpm varies from $0.26 to $0.78
Cost Per Click depend on the origin of traffic, niche, and good keywords. So there might be change in the origin of traffic.