Market heat dashboard
Two readings of how hot the Taiwan market is right now, on one page. Day trading share of turnover measures how crowded short-term money has become; advancing and declining issue counts measure how much of the market is actually taking part in whatever the index is doing.
- A new index high is not the same thing as a broad advance. When the advance-decline line stops confirming the index, the move has narrowed to a handful of names.
- Taiwan reports same-day round-trip turnover as a daily official statistic, which most markets do not. The full series from 2014 is here, both boards separately.
- Counts of stocks at trailing one-year highs and lows turn "is this rally broad" into a line you can look at.
Day trading heat
The share of turnover that never held a position overnight. The OTC board normally runs several points hotter than the main board, so the two are drawn separately rather than blended. The chart opens on the last three years; drag the zoom bar or use the buttons to go back to 2014.
| # | Ticker | Board | Day trading ratio |
|---|
Market breadth
The advance-decline line drawn against the weighted index, with daily net advancing issues in the panel underneath. Read the slope of the line, never its level — the starting point is arbitrary and the level is an artefact of it.
How it is built
Two of these four come straight out of official daily files and two are computed here. Which is which is stated rather than left for you to guess.
Day trading share of turnover
Same-day round-trip turnover divided by total market turnover, published daily by the exchanges and reported separately for the main board and the over-the-counter board. The series starts in 2014, the year same-day trading was opened up to ordinary cash accounts, so it covers the practice from its beginning.
Per-ticker day trading ratio
A ticker's same-day round-trip volume divided by its total volume that day. Only tickers clearing a daily volume floor are ranked — without it the table fills up with names that traded a few hundred shares and happen to show a 90 percent ratio on a meaningless base.
Advance-decline line
The running sum of daily advancing issues minus declining issues, counted across listed common stocks. The absolute level carries no information because the starting point is arbitrary; what matters is the slope and whether it agrees with the index.
New highs and new lows
Counted here rather than taken from an official file: a stock is a new high if its close is the highest of its trailing 252 trading days, a new low on the same rule inverted. It is a derived statistic and is labelled as one.
Terms
Four words carry most of this page:
Where the line is
The day trading shares and the advancing and declining issue counts are official daily statistics reproduced as published. The advance-decline line is nothing more than their running sum. The new high and new low counts are the one place where a choice was made: a 252-day trailing window on closing prices, applied to listed common stocks. That window is the conventional one and it was not selected by checking which length would have marked past turning points best.
What none of this tells you is what happens next. A crowded day trading share has coincided with tops and it has also run hot for months while the market kept going. A narrowing advance can persist for a very long time. These are descriptions of market structure with their construction written out, published so you can look at them alongside your own work — not signals, and not a view on where the index goes.
FAQ
What is a normal day trading share for Taiwan?
Over the past few years the main board has generally run somewhere in the high teens to low twenties in percent, with the OTC board several points above it. The number is only useful against its own history, which is why the chart opens on three years and the full series back to 2014 is one click away.
Why does the advance-decline line sit at a large negative number?
Because the starting point is the first day of the series and every day since has been added to it. The level is an artefact of where counting began and means nothing on its own. Read the slope, and read it against the index line drawn on the same chart.
What is the divergence everyone talks about?
The index making a new high while the advance-decline line fails to follow. It says the advance has narrowed to fewer and fewer names, usually the largest ones. It is a description of market structure, not a timing signal, and it has stayed in place for long stretches without anything happening.
Are the new high and new low counts official?
No. They are computed here from closing prices against a trailing 252-day window, and that is stated rather than buried. The advancing and declining issue counts and the day trading shares do come straight from official daily files.
Do I need a key or a paid tier?
No. Both series are market-level, free on the API with no signup and full history included. Each endpoint takes a range parameter of 1y, 3y, 5y, 10y or all.
Run it yourself
The free tier needs no signup — call this feature's API straight away with the demo key. Unlock as-of history and full ticker coverage on a paid tier.
The market temperature set
Three complementary market-level readings — leverage, sentiment and participation. The leverage one lives on its own page: