One minute allows for fine tuning of risk, but the key to trading one minute timeframes is knowing why price makes irregular one bar patterns. Often times traders believe it was to hit the stops of retail when a bar is three times normal bars or what is normal of last ten bars, but it can be a more distant trendline seen on five minute bars starting from day before.
There are more false signals in one minute timeframes if you using TA, but if using charting rules and or patterns, AND you are well versed in how to draw proper trendlines/patterns, risk becomes far less/reward far greater on one minute as opposed to larger timeframes. But your skills dictate end results.
One reason many fail at trading one minute is inability to see when not to take otherwise viable signals. Once should know what the average swing(Elliott's five waves), so say you trading ES and mean average of uptrend is 12 points, if price is at 11 points and you get a buys signal, you can either pass on signal or reduce a time management stop, trade either takes off in one bar or try to get out after one bar. Traders seldom know of reliable chart patterns at ends of trends and too often buying into a heads and shoulders near 10-12 points of uptrend in ES, and swing averages change due to volatility.