About ChartClock
Exchange time, sitting on the chart.
The problem
In a trade, your eyes are on price. The 5-minute close, the end of the opening range, lunch, and power hour still happen whether you look at a clock or not. Platform clocks are wall time or a tiny timestamp. They do not count you into the candle.
Why that matters
Day trading is mostly when, not a new indicator. Open, first 15, 10:00, lunch, last hour, close. Miss the time and the setup you were watching is already gone.
The inconsistency
Broker clock, chart timestamp, phone, and the exchange are not the same clock. Lunch looks like any other hour. Almost nothing on the platform says this is the opening range, or that two candles are about to close together.
The solution
ChartClock is exchange time: remaining on the 15-minute, 5-minute, 1-minute and 10-second, plus a session tape. Free in the browser. Pro is the small always-on-top window that sits on the chart. Turn on click-through so you still trade through it.

Where the idea came from
ChartClock comes from a trader who spent a previous life producing music. A studio session has a playhead, a ruler, and a click so you feel the bar without staring at the counter. Charts did not. The overlay is that ruler and that click, sitting on the tape.