Quote from Fleming Snopes:
Twenty may be right for ES (I assume you mean on a one minute chart?), I don't know. It is way off for what I trade, for what that may be worth.
I use a 5-min chart for ES, and a 3-min chart for stocks.
I don't think it matters what, if any, indicators you use; I think what's most important is you're able to settle on several "pictures" of price action in your preferred time frame that leave you with confidence based on the positive expectancy that derives from predictable follow-through. Whether its price bars alone or price bars with additional indicators, once you internalize patterns and the most common moves they've triggered throughout history, as well as the reaction to the shock of a failed pattern, you eventually reach the point where you simply react to setups and exit or reverse when the expected follow-through fails.
I also use multiple time frames outside my trading time frame to locate fractals of confluence where, for example, I may see that price on a daily chart is overextended and on a 30-min weekly chart is overextended, and then look for a trend reversal signal on a 3- or 5-minute chart based on a previous day's high, low or closing price.
I think a strong visual memory has been of great benefit to me. This allows me to quickly internalize the patterns painted by price bars alone or price bars with indicators. Over time I find myself reacting more and more intuitively to setups when they appear; trading my strategies is gradually becoming as comfortable to me as driving a car.
New traders may study historical charts and then find indicators or patterns that predict price action "every time". They then believe they've discovered the Holy Grail. This may lead them to disbelieve failed setups and refuse to exit a trade whose setup has been invalidated, or to average down until they're suddenly in big trouble.
So I always have a max stop loss for my trades, and a specific trading plan to match specific setups.
I think the most important step new traders can take is to create a trading plan with max capital risked per trade, max loss per trade, max loss per day. DO NOT violate the plan! Even though a pattern follows through "every time" there are exceptions that can wipe you out if you refuse to exit or continue to average down. Look at this year's charts of AIG, GMCR and MTXX for examples of major breakouts that did not "come back".