Rising on Unusual Volume

What does this mean?
SymbolNameLast TradeChangeVol. % Changeat Investors.com
RXNRexnord Corporation Common Stoc29.55 4:01PM EDTUp 0.95 (3.32%)88%Stock Checkup
ACMPAccess Midstream Partners, L.P.62.29 4:03PM EDTDown 0.64 (1.02%)70%Stock Checkup
TENTenneco Inc. Common Stock52.36 4:04PM EDTUp 0.92 (1.79%)36%Stock Checkup
EXPEagle Materials Inc Common Stoc87.43 4:02PM EDTUp 0.61 (0.70%)32%Stock Checkup
JKSJinkoSolar Holding Company Limi24.67 4:04PM EDTUp 1.61 (6.98%)19%Stock Checkup

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