The Stochastic oscillator is meant to girate between 100 and 0. A very low level means emotions have caused people to sell in panic. A very high level means emotions have caused people to become too greedy.
Look for buying opportunities when the Stochastic oscillator nears its lower reference line. Look for selling opportunities when the Stochastic oscillator nears its upper reference line. Waiting for the Stochastic oscillator to drop is intellectually hard because markets look horrible near bottoms, which is precisely the perfect time to buy. When the Stochastic indicator rallies to its upper reference line, it tells you to start looking for selling opportunities. This also goes against the grain emotionally. When the Stochastic indicator rallies to a top, the market often looks fantastic, which is a good time to sell.
New traders mess up by trying to over simplify trading. Don't do this. Use the Stochastic indicator with other technical indicators. Keep in mind that when a powerful uptrend begins, the Stochastic indicator quickly becomes overbought and begins showing premature sell signals. In a sudden panic sell off, the Stochastic indicator quickly becomes oversold and begins showing premature buy signals. Therefore, this indicator only works if you use it with other trend-following indicators.
Should you wait for the Stochastic indicator to turn up before buying? Should you wait for it to turn down before selling? No. If you wait until the Stochastic turns, you'll miss out on making a lot of money. What you are trying to do is enter as soon as the Stochastic indicator reaches an extreme. View very low or very high Stochastic readings as a measure of the emotion in the crowd that is trading your stock. When there are more emotional traders in a stock, the better you can take money away from those traders. It is easier to make money from emotional traders than it is from calm, rational traders.
If you see a positive divergence between the Stochastic and the price of a stock, go long. A positive divergence is when the stock price drops to a new low, but the Stochastic indicator makes only a slight low and does not break to a new low. Do the opposite on the downside. If a negative divergence forms between the price action of a stock and the Stochastic, consider short selling. A negative divergence takes place when a stock rises to a new high, but an indicator drops or hardly rises.
Do not buy a stock when the Stochastic is high. The opposite is also true, do not sell or short a stock then the Stochastic is low. This is probably the most accurate way to use the Stochastics. Reverse your logic and think of it as showing you when you should not be trading a market. If you need to pick up on a trend, then moving average lines are better than the Stochastic whereas the ADX is really good for timing entry and exit levels, but the Stochastic is king at telling you when you should NOT be trading a stock.