Below is my stats AdSense for Content Page view: 240,278 Clicks : 325 Page CTR: 0.14% CPC: $0.54 RPM: $0.73 Total Earning: $174.45 Is this good ? not sure what's the average CTR should be?
CTR depends on your niche and ad placement. A 0.14% CTR is very low. I would suggest moving your ads around or changing niches. Anything above 3-4% CTR is decent.
Forums always have lower CTR, because you have mostly repeat visitors. Not easy to get a higher CTR on a forum.
Don't use standard and leaderboard banners. Use Rectangles. Check: AdSense integration together with nice welcome message AdSense inside the first post - AdSenseExperts.com Exclusive
place one 728x90 under first post and place two 336x280 under the thread title ...! I bet you can triple your ctr