The lure of successful trading strategies is seductive, and looking at your portfolio shrink in value during a market downturn can be painful. But many times investors seeking to circumvent the pain or trying to get a leg up in their investments by temporarily shifting away from their long-term strategy will end up trading one source of anguish for another.

History was made when a young Isaac Newton discovered the law of gravity when he was was hit on the head by a falling piece of fruit. Does the law of gravity have any bearing on financial markets?