Believe it or not, the rock band Van Halen found a brilliant way to teach how having good indicators is key to achieving success.
This is extremely true for the world of investing, where you're deploying capital based upon an expected future return. How do you determine when it's a good time to enter into an investment? Once in it, how do monitor the conditions supporting your rationale for holding it — are those changing? And if so, are they getting better or worse? When should you exit the position?
For all of these questions, the better the indicators you use, the more accurate and informed your decision-making will be. And the better your returns as an investor will be.