Private, 1st Class
There are a lot of indicators so we can use the one which better suits to our needs however this is also good if we learn the price action instead of the indicators. Because price is the one which is actually happening in the market at the moment whereas the indicators show lagged data.I don't use indicators.
Probably the more the better. When robotic systems offer this, they always say that they use 10-15 indicators and it really works.