A day trading chart should answer four questions: where is value, which way is it going, is the move real, and how much room does it need. These five cover all four.
VWAP
Volume weighted average price · session reset
The single most useful intraday reference. Institutions benchmark fills against it, so price tends to react at VWAP and its standard deviation bands. Above VWAP and holding = buyers in control; repeated failure to reclaim it is the cleanest short filter there is.
9 and 21 EMA
Trend · 1m to 15m
Fast exponential averages track intraday momentum without the drag of a 200 SMA. The relationship matters more than the cross: price riding the 9 EMA is a trend to hold, price chopping across both is a range to skip.
RSI (14)
Momentum · same timeframe as your entry
Use it for divergence and for failure swings, not for '70 means sell'. In a strong intraday trend RSI parks above 70 all morning. Divergence into a level you already marked is the signal worth acting on.
ATR (14)
Volatility · sets stops and targets
ATR tells you what a normal candle costs right now. Stops at 1.5-2x ATR beyond your level survive routine noise; a fixed 10-cent stop does not survive an open with triple the usual range.
Relative volume
Participation · compares to the same time yesterday
A breakout on 30% of average volume is a trap far more often than a trend. Relative volume above roughly 2x is what separates a stock worth trading today from the same ticker on a dead Tuesday.
Opening range
Structure · first 15 or 30 minutes
The first thirty minutes set the day's reference high and low. Most clean intraday trends are a break and retest of that range; most chop is price oscillating inside it. Marking it costs nothing and filters a lot of bad entries.