some useful links/有用的链接

pivat point 计算
http://www.livecharts.co.uk/pivot_points/pivot_points.php?symbol=^GSPC


check short percent
http://www.shortsqueeze.com/
institution hold(GS)
http://www.mffais.com/institutions/125469/
ER

http://www.earningswhispers.com/calendar.asp
http://biz.yahoo.com/research/earncal/today.html

maxpain
Current Pain is an improved estimation, compared to Option Pain, of the stock price manipulator's target. While Option Pain is calculated based on all outstanding options in the market, Current Pain is derived only from options sold since last option expiration. Options sold several months ago are less relevant to the current market condition. Therefore, Option Pain may be misleading. Current Pain is derived only from options sold since the last option expiration date. It is more relevant to the current market condition and could be a more accurate proxy for the stock manipulator's price target.
http://www.iqauto.com/cgi-bin/pain.pl
http://www.optionpain.com/MaxPain/Max-Pain.php

etf list：
http://etf.stock-encyclopedia.com/

How to backup blog:
http://diguastock.blogspot.com/search?max-results=1000

free LEVELII
http://datasvr.tradearca.com/arcadataserver/JArcaBook.php?Symbol=CHB&x=17&y=5


option download
1. Yahoo
2.CBOE:http://www.cboe.com/delayedquote/QuoteTableDownload.aspx