Position sizing is so incredibly important when it comes to successful trading in the stock market. But at times, you can have too many positions at once and it leads to horrible consequences to your portfolio. Having the right approach is so key to insuring consistent and sustainable profit generation from the stock market.Position sizing is so incredibly important when it comes to successful trading in the stock market. But at times, you can have too many positions at once and it leads to horrible consequences to your portfolio. Having the right approach is so key to insuring consistent and sustainable profit generation from the stock market.