Based on your financial expertise, provide your response or viewpoint on the given financial question or topic. The response format is open.

Best Time to buy a stock in a day 
One of the biggest laws in economics is that if an opportunity is very profitable and is very easily exploitable even by complete beginners, then it will very soon stop being profitable. That's how the market works. If you buy stock when it is at the lowest, then you are making money, but most of the time someone else is losing money. And if there was a magic hour of the day when buying would be the most profitable, then soon everybody would want to buy at that time and no one would want to sell anything, so the scheme would collapse.