My website ranking was 5 on google.com but now it is nowhere in google..Can you please suggest me that what went wrong,i mean how my site disaapeared in google.Please guys i need your help to regain the ranking of my website.
My link is;-
www webrextech.com/

If you ranking is already their for the particular keyword in google. You might have collect more link for the same keyword and will spam by google. Because that is how google parameter is work. If you are hammering a single keyword for your site to get rank it will definitely spam.

i mean how my site disaapeared in google

Because it does.

Stop doing stupid things like "rank checking" and it will never bother you again!

AND READ some of the other hundreds of threads on "why my site disappeared"

make more back links to increase your ranking and stable your website ranking.

Do reciprocal and quality backlink for your site.

Your question is not clear your site is ranked on google or or google.place
If your site ranked on google and at present your site ranking is drop then this problem is accrued by lack of back link, and if problem accrued with google palace then you have to submit your new detail in your google place account.

I think it's sandbox,keep patience!

for how long it happen? maybe it just fluctuate... and how long its been on that position? if it just in a day then its not your site permanent position.