Black Candles are bearish lines in candlestick and candlevolume charts. They signify that the closing is lower than opening for that time period.
CHKDSK, short for Check Disk, is a utility that checks the integrity of the files and file structure of your hard disk. I'll walk you through it. I have disk problems and you said I should run CHKDSK. Great.
Answer: The CHKDSK Utility can check and fix hard drive errors. CHKDSK scans the hard drive, corrects logical sector errors, marks bad sectors that cannot be fixed and moves data to safe, healthy places on the hard drive.