That info can be used to determine a buy in price or a sell price. Buy near support and sell near resitance if you are a day trader. However, Barcharts is a good resource for DD, but pennies are easily changed by news, MM's and the earths gravity that it doesn't realy do you any good.
To become a better trader here is some advice I can give you.
#1 Always protect your money, never hold a falling stock no matter how much you think it will rebound ( You will know when a stock is falling because of a shake and not from sellers selling once you take more time to understand the market )
2# Buy books, go online, but learn how to read charts !! You might as well throw fundemental analysis out the window on penny stocks. The most I look at on pennies is there outstanding share structure ( even that doesn't matter most the time ) I look to make sure they haven't changed symbols alot and had a bunch of R/S. Almost all my DD is based on Technical analysis .... learn to read charts bottom line.
3# Don't get greedy ... take profits when you can. Sell out a portion of your position and ride with free shares.
4# TRADE pennies ... dont invest in them!!
5# Dont fall in love with a company ... they are just ticker symbols... like a deck of cards if you will.
6# Learn as much as you can about the market, nakid shorting, selling short, hedging.. etc..
7# NEVER NEVER NEVER average down .... that means you broke rule #1
8# Average up !! if a stock is moving add to it ... however never add more than half the amount each time .. like buidling a pyramid .. you want your base bigger then your top.
9# hell .. I could go on and on...
Go to stockcharts.com to learn to read charts
Go to investipeida.com to learn other goodies
Go to pennystocks.org for even more info
Buy Technical Analysis for dummies ... great book
There ya go ... before ya know it you can day trade for a living ... any one can .. just gota know how !
Char
Market Data 
Markets 
AI
