From a trading perspective, Tom likes to see pullbacks to the 20-day moving averages as long as the PPO is still sound (watch out for any negative divergences as they may indicate additional room to the downside).
Otherwise, if you prefer to buy-and-hold, you may simply enter the stock and hold for the duration of the 90-day period.
Disclaimer: We are not Registered Investment Advisors so we're not licensed to give advice and/or recommendations.