Combining indicators without signal noise

How do you combine leading and lagging indicators effectively without creating signal noise?

If you have a leading indicator and you know where the price is going why do you need to confirm it with lagging indicator ?
Or leading indicator is just a myth ?

I don’t really believe in “signal noise”.

Why would anyone who had a “leading indicator” want to combine it with lagging ones?

are you a turtle?

No more or less a myth than any other kind of indicator, I think? They indicate what they're programmed to indicate, don't they?

Different people mean different things by "leading" anyway, don't they? Just as with almost everything else they discuss about trading.

Whether and how we choose to use that is up to each of us? It's all a probability function, like almost everything else in trading, isn't it? With which most people struggle on the basis of poor understanding of probability (which is a difficult subject), and end up trading on "hope". No disparagement intended, but that surely describes the great majority of forex traders?

To be honest, I suspect that quite a lot of people entering trades on the basis of indicator combinations probably imagine that trade entry timing is a really major component of their trading plan and activities, and my own opinion is that until they somehow change their minds about that, it's going to be close to impossible for them to become steadily profitable anyway. (Call me jaundiced, if you want! I just think an awful lot of people don't really know the difference between a trading system and an entry method).

Is a leading indicator a re-painter?
Is it a trendline/Fibonacci level?

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Sometimes I feel like combining both can actually give me more context, you know, by confirming the move and giving me more confidence in the setup.

I mean more like support/resistance zones, trendlines, and Fib levels, stuff that helps me anticipate where price might react. I don’t use re-painters. I usually combine those with something like moving averages or RSI just to confirm things before jumping in.