Keywords tools, what's wrong with them?

OK, i have a topic about this in subforum "keywords" but it seems not too popular (that subforum) so I will bring it here. This is my question in another forum:

Hi, i am using freekeywords.wordtrackers.com and tools.seobook.com/general/keyword

but why the results are different? For example: "Latest soccer news" in wordtrackers and seobook results are different. Another example, if you search for "penis enlargement" you will find nothing in wordtrackers but in seobook, very much people are looking for it, why is that?

And these results are also different from another keyword suggestion such as overture, why is that? What is the most accurate tools then? Because you
know, if I am looking to find niche in keyword "A" for example, no one searched for "A" in google according to seobook but the strange thing is, wordtrackers told us many people are looking for "A". And if I want a keyword "B" as my niche, I can't find anything in wordtrackers but there are many people looking for "B" in seobook. This is so confusing me, what is my niche then? because I even don't know how many people are looking for my keywords..

Someone told me:

I replied:

OK i have checked via digitalpoint. Now I want to ask, overture is only yahoo right? The differences are very clear between overture and wordtracker (also seobook). I was searching for "best weight loss pills" and in wordtracker only 2.0 searchers/day but in overture, 164 searchers/day (US only)...and when I checked in freekeywords.wordtrackers it is different (again), it is written 89 searchers...in seobook it is different again. I mean, the differences between them are very slightly...so I want to ask one question, what should I do because I am working into one niche which I think are not so popular (even no searchers) in wordtracker but the strange thing, the keyword is popular among overture and seobook...

if in example I want a keyword "best weight loss pills" (i.e. above) I think overture and seobook are telling me it is a keyword with so many searchers but when I searched via wordtracker, only 15-20 per day? How is that? Very2 different. I don't know now what keyword should I use...So what to do?

 

now i'm almost get it...wordtrackers only track 1 million searchers, am I right?

 

All the data is just an estimate based on the sources that each tool uses. You can't really rely on the figures except as a general guide.