Timeframes, and what changes between them
Every chart shows the same transactions. The timeframe decides how many of them get squashed into one bar, and that choice changes more than resolution.
A bar is an aggregation. A 5-minute bar takes every trade in five minutes and reports four numbers: where it opened, the highest price, the lowest price, and where it closed. A daily bar does the same for a session.
The underlying transactions are identical on every chart. The timeframe only decides how coarse the summary is.
What is lost as you go higher
Detail, obviously — but specifically path. A daily bar that opened at 100, closed at 102, and ranged from 99 to 103 could have been a steady climb, or a fall to 99 followed by a rally to 103 and a fade. Both produce identical daily bars. Only a lower timeframe distinguishes them.
What is gained is signal-to-noise. Fewer bars means fewer turning points, fewer marks, and fewer decisions, most of which is a benefit rather than a cost.
The boundaries are arbitrary and this matters more than it seems. A 5-minute chart starting at 09:30 produces different bars from one starting at 09:32. The market did not change. Any pattern that depends on exactly where a bar closes is partly an artefact of when your platform decided to start counting.
The indicator interaction
A 14-period setting covers 14 bars regardless of what a bar is. On a 5-minute chart that is a little over an hour. On a daily chart it is three weeks.
Carrying the same settings across timeframes is not applying a consistent method — it is asking different questions and reading the answers as though they were comparable. This is covered in more depth in settings and periods.
Charts are not self-similar
It is often said that a chart looks the same at every scale. Broadly the shapes rhyme, but the mechanics do not. Lower timeframes carry a much higher proportion of spread and microstructure noise. A one-tick move is meaningless on a daily chart and can be a whole bar on a very short one.
The practical consequence: costs scale with the number of decisions. Dropping from an hourly to a one-minute chart multiplies your trade count, and every one carries spread and commission. A method that works on paper at high frequency can be net negative purely from friction.
Using more than one
Consulting a higher timeframe for context and a lower one for detail is standard and reasonable. Two cautions.
An indicator on a lower chart that pulls values from a higher one will show the higher bar's final value across every lower bar inside it — including the ones that printed before that value was known. That is repainting, and it is easy to miss.
And two timeframes reading the same price series are not independent evidence. Their agreement is one observation, for the same reason correlated indicators are.
Choosing one
Work backwards from how often you can actually look at a chart. A timeframe that requires attention you do not have produces missed decisions and late ones, which is worse than a slower chart you can actually follow.