Day trading is a commonly-used technique, albeit an inherently risky one, in the world of finance. Day trading demands quick thinking, fast acting, and a sharp sensitivity to market shifts. However, in capable hands, it may pave the way to immense profits.

Day trading involves buying and selling a financial instrument such as stocks, forex, or commodities within a single trading day. This means positions are usually opened and closed within a single session. This method is typically used by seasoned traders due to its inherent risk.

Day trading's core principle rests on exploiting market volatility. Through capturing the price movements in a day, traders can capitalize on small gains that collectively result in significant profits.

To succeed in day trading, individuals need a robust strategy. This plan ideally encompasses technical analysis, efficient risk management, and the mental fortitude to handle the stress. Technical analysis involves the use of charts and other tools to identify patterns that can predict future price movements. Risk management, on the other hand, involves setting up safeguards against potential losses.

Psychology plays a significant role in day trading. Impulse and fear-induced decisions are common pitfalls that can lead to substantial losses. Hence, staying disciplined and adhering to the trading strategy is the cornerstone of success in day trading.

It remains paramount to understand that day trading is not for everyone. Its risky nature and the required technical expertise can be overwhelming for novice traders. Without proper knowledge and understanding of financial markets, technical analysis, and risk management, diving into day trading might be a dangerous endeavor.

While day trading has the potential to yield superior profits, it also accompanies sizeable risks. Sound knowledge, proper planning, and discipline are the pillars of successful day trading. Hence, approaching day trading with the level of seriousness and respect it demands is vital.

Despite the risks, for those who perform their homework diligently and aren't trade the day afraid of hard work, day trading can be a financially rewarding and satisfying enterprise.

In conclusion, day trading is a risky but potentially lucrative financial activity. Successful day trading demands a comprehensive understanding of market trends and the mental capacity to withstand the stress of quick-fire trading decisions. In the end, day trading isn't a get-rich-quick scheme, but rather a financial venture that requires patience, discipline, and the tenacity to weather the waves of the fickle financial market.