As a great saying
‘Whenever there is a rise in the stock market there has to be a fall..’
For smart investor, the decision rest on the entry and exit point.
As we can see from our Indian Stock Market CNX Nifty 50 which has closed today (12th Oct. 2017) at the 10096 points, generating the resistance level at 10146 and 10430. Meanwhile, also trying to maintain its support level at 9975 and 9685 respectively.
For Smart Investor, the decision relies on the entry and exit point on a particular stock by following the Principle of Caveat Emptor.