www dot go4bagtrade dot com. it is promoted about 3-4 month, site age is 1 year. got good rank. about 2 month ago, his homepage dispear from serp,but still indexed. appear again after 2 weeks. Now the homepage dispear again. why? why?
This is due to certain factors, usually to algorithm changes or issues with data centers. If the results keep returning to normal there isn't much to worry about or much that you can do. I suggest just waiting it out and seeing if they come back to their normal position.
I don't know, probably needs more links as not many incoming links show. however a couple of things to point out. There is no robots.txt it gives a 404 but with full site map, could possibly confuse things, although the server does send correct 404 headers, so should be ok. Better to add a robots.txt probably. On the index page there is not a "space" in the text after any of the punctuation ie . or , so often the keywords targeted at the start of a sentence will not have the value they should. in your post above you put www at the start but the "home" link at the top of the page goes direct without the www .... links need to be consistent either with or without the "www"
What both guys said are good ideas..wait it out a little and in the meantime, continue to build backlinks to it. Directory submissions, link exchanges, article submissions, whatever you can do to continue building good backlinks will help. It will also probably help it keep its ranking and not drop.
Well, one will agree with me or not, i am not sure, But recently i have found, one person, have created back links for home page more than 1500 in just a month from white hat tactics, and his home page was not coming in search results, nor indexed, still other pages were indexed, It was unbelivable for me also, i suggest him to stop creating back links for few days, and in just a week he found his website homepage being indexed as well as coming in serp too.