everybody uses indicators. indicators are all forms of presentation of information that can be used. indicators are indicating something, so watch the order book is an indicator, watching pricecharts are indicators, MA, RSI... are indicators. even watching the moon might be an indicator.
everything a trader uses as information in any form is an indicator. there are however different forms of indicators but that is the visual side of the story, not the essence. the visual side is only important to translate the indications you generated in a readable form. can be charts, patterns or anything else.
so this thread is useless as everybody in fact uses the same things, but they are not conscious about it. in fact they discuss only the way the indication is presented to them, not the underlying.