This video shows how profit can be made selling first and buying later in Intraday trading, using the most basic scenario in Intraday Trading on the Sell side.
Pivot Point Calculator: http://www.stockadda.in/pivot-point
Zerodha Account Opening: https://zerodha.com/open-account?c=ZMPOWS
Zerodha Brokerage Calculator: https://zerodha.com/brokerage-calculator#tab-equities
Zerodha Margin Calculator: https://zerodha.com/margin-calculator/Equity/