Use the Bloomberg terminal in the Business Library. Enter HILO for a list of securities that have reached a 52-week price high. Enter MOST, and change the View to "Most Up" for a list of recent high value price changes.
Use the Bloomberg terminal in the Business Library. In the Equity area do a Custom Search (QSRC). Under Pricing variables, select a variable such as "Change 1 Year Percent" or "Change 5 Day Percent."