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.
How to Run CHKDSK in Windows 10. CHKDSK short for Check Disk checks the state of the hard drive and correct any errors it finds, if possible. It can be useful for troubleshooting read errors and other storage related errors. It has been in Windows for quite a time.