Investors with a long-term horizon can afford to be patient, said Cramer. So for an investment of 400 shares of a $90 stock, he'd start by buying just 100 shares. If the stock fell to $85, he'd buy 100 more, and again at $81 and below $80. By using wide scales, investors can take advantage of the many selloffs the market has to offer and build a position at a price well below their initial entry points.
What if the stock doesn't dip below $90? Cramer said that's a high-quality problem to have. Investors may not be able to get as many shares as they had hoped, but they're still making money on the ones they were able to buy at the good price.
Cramer said he's not a fan of using smaller, strict scales, which dictate buying more as a stock falls every $1 to $2 a share. In today's market, stocks tend to be more volatile, and it would be a shame to miss out on that $8 decline because you bought all your shares just $3 lower.
To use a baseball analogy, Cramer said that when it comes to buying stocks, investors need to keep the bat on their shoulder and wait for the right pitch.