Re: what rsi setting is best ?
On a serious note. Any indicator, leading or lagging can be used effectively if fully understood by the user and using it in a way which gives you an edge - Through experience you can see what the indicator does in certain situations, for example you may find lagging to give you a late signal and therefore you could change your rules from experience to give yourself for an edge.
A real life example for example is of a friend telling me about MACD (when i was new to trading) saying to buy when it turns green or red, i investigated this and found it to be quiet late and often a move move the bar before had been hit, so i changed the entry so that i would enter after to increasing red MACD histogram bars for a long.
Don't go by teh book, learn indicators yourself and you can use them effectively. Remember also that they behave differently on different markets, for example a choppy day on the FTSE100 you'll get kained by using MACD, stochastics may be okay, EMA's will chop you up - But using pivot points may get you in and out effectively throughout the day or using standard deviation to wait for small consolidations and breakouts even on a choppy day.
To identify trending and non-trending days you have to create rules. For example i only trade if an impulse higher-time frame isn't apparent, in other words i only buy into higher time frame momentum.
RSI settings 14 are fine but check on your chosen market and furthermore investigate the signals its giving you and make your own rules about them
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