# TICK Index Also known as: NYSE TICK, cumulative TICK. A Breadth, Sentiment & External Data concept (Breadth) in the LuxAlgo Library, with 1 indicator implementation. ## What is the TICK Index? The TICK index is a real-time market internal: at any moment it equals the number of NYSE stocks whose most recent trade printed on an uptick minus the number whose last trade printed on a downtick (a NASDAQ version, TICKQ, does the same for that exchange). It refreshes continuously through the session and captures instantaneous, marketwide pressure, much of it driven by program and basket orders that hit hundreds of symbols at once. Readings oscillate around zero, most prints sit within a few hundred either side, and moves beyond roughly plus or minus 1,000 are commonly treated as extremes. TICK is among the oldest intraday internals, a fixture of index-futures day trading since the floor era precisely because it sees what the index quote hides: whether this second's tape is a broad program sweeping hundreds of names or a handful of heavyweights moving the average alone. Its character drifts with market structure, decimalization, algorithmic execution, and changing listing counts have all shifted the distribution of readings over the years, so its thresholds are calibrated rather than carved in stone. It is strictly a regular-session tool: outside [regular trading hours](https://www.luxalgo.com/library/concept/rth-vs-eth/) few stocks print, so the reading sits near zero and means little. And because each print is a snapshot rather than a total, day traders also keep a cumulative TICK, a running sum of readings across the session, to see whether pressure is persistently one-sided. The standard reads split by regime. In balanced conditions, extremes mark short-term crescendos of program activity that mean-revert within minutes, the fade trade; on trend days the same extremes recur all session on one side while the zero line barely gets visited, and the correct read flips from fading prints to respecting the persistence. Cumulative TICK arbitrates: a running sum that trends steadily is the one-sided-day signature, while one oscillating around flat certifies the fade regime. ## How to read the TICK index TICK is read as a distribution and a rhythm, not as isolated prints. 1. Plot the session's TICK with guide lines near +1,000 and -1,000, then calibrate those extremes against the recent weeks' actual distribution. 2. Confine the reading to regular hours: outside the cash session the index sits near zero and carries no information. 3. Watch which side of zero hosts the session: readings spending hours predominantly positive or negative mark a one-sided tape. 4. Run the cumulative sum alongside: a trending cumulative TICK is the trend-day signature; a flat, oscillating one licenses mean-reversion tactics. 5. Treat extreme prints by regime: in balance they are fade candidates back toward the mean, on trend days they are confirmation of the drive. 6. Compare TICK swings at price extremes: a new session high in price on a weaker TICK high suggests the push is running on fewer names. ## How it's calculated The net count of NYSE stocks whose most recent trade was an uptick versus a downtick, updated throughout the trading day. ``` TICK_t = U_t - D_t CumTICK_t = CumTICK_(t-1) + TICK_t TICK_t: TICK Index reading at time t U_t: number of NYSE stocks whose most recent trade printed above the prior trade price (upticking) at time t D_t: number of NYSE stocks whose most recent trade printed below the prior trade price (downticking) at time t CumTICK_t: cumulative TICK, a running sum of successive TICK readings, commonly one reading per bar close t: observation time, tick by tick or per bar ``` Stocks whose last trade was unchanged count in neither U_t nor D_t. The index is computed and published by the exchange (symbols such as $TICK or TICK.NY); parallel versions exist for Nasdaq and other exchanges. Readings beyond roughly +1000 or -1000 are commonly treated as short-term extremes, and the series is only meaningful during regular trading hours. ## How traders use it - As a fade trigger: in rangebound conditions, mean-reversion day traders fade extreme prints back toward the session average, accepting that on trend days the same extremes simply keep coming. - As trend-day recognition: TICK holding one side of zero for hours while cumulative TICK trends marks a one-sided session where fading is the wrong playbook; [up/down volume](https://www.luxalgo.com/library/concept/up-down-volume/) gives the volume-weighted second opinion. - As a divergence read: a new session high in price on weaker TICK highs suggests thinning participation behind the push, a warning to tighten management rather than a standalone signal. - In a layered internals stack: TICK supplies the second-by-second pulse while [advance/decline internals](https://www.luxalgo.com/library/concept/advance-decline-internals/) score the day and slower breadth gauges frame the regime, each clock answering a different question. - For execution timing: scalpers time entries against adverse TICK crescendos, entering longs as a negative extreme exhausts rather than into it, using the internal as a micro-timing aid for decisions made on other grounds. ## TICK vs other breadth internals - **Advance/decline Internals** (https://www.luxalgo.com/library/concept/advance-decline-internals/): A/D counts issues up or down on the day, a slowly drifting session score. TICK counts last prints this second, mean-reverting in minutes. One is the scoreboard, the other the crowd noise, and day traders typically watch both. - **McClellan Oscillator** (https://www.luxalgo.com/library/concept/mcclellan-oscillator/): The McClellan oscillator smooths daily advance-decline differences into a multi-day breadth momentum read; it has no intraday existence. TICK lives entirely inside the session. The pair bracket the timescales of breadth analysis. - **% Stocks Above 20/50/200-day MA** (https://www.luxalgo.com/library/concept/percent-stocks-above-20-50-200-day-ma/): Diffusion percentages describe participation regimes over weeks and months, updating once a day. TICK updates every second and forgets within minutes. The two share the equal-vote philosophy at opposite ends of the clock. ## FAQ ### What is an extreme TICK reading? Convention treats prints beyond roughly plus or minus 1,000 as extreme, meaning the tape's last prints are heavily skewed to one side. The practical threshold drifts with market structure and the volatility regime, though, so many traders calibrate to the recent distribution of readings, for example the last few weeks, instead of a fixed number. ### What is the difference between TICK and ADD? TICK counts last trades: stocks whose most recent print was an uptick minus those on a downtick, so it measures pressure at this second and mean-reverts quickly. ADD counts issues up versus down on the day, part of the [advance/decline internals](https://www.luxalgo.com/library/concept/advance-decline-internals/) family, so it drifts slowly and describes the session's overall score. ### What is cumulative TICK? A running sum of TICK readings sampled through the session (implementations vary in sampling method), which converts the mean-reverting snapshot into a trending line. Its slope is the payload: steadily climbing cumulative TICK marks persistent buy programs even when no single print looked dramatic, while a flat line around zero certifies the two-sided conditions that fading strategies want. ### Why is TICK meaningless outside regular hours? Because it counts last prints across listed stocks, and outside the cash session most stocks simply do not trade. With few prints refreshing, the index parks near zero regardless of what futures are doing, so premarket TICK reads as apathy no matter how eventful the tape. Futures traders working the overnight lean on the futures' own internals instead. ### How do program trades shape the TICK index? Basket executions hit hundreds of symbols within seconds, flipping their last prints to the same side simultaneously, which is exactly what spikes TICK to extremes. That makes the index a de facto program-activity monitor: rhythmic extreme prints mark algorithmic sweeps, and the fade-versus-follow decision is really a judgment about whether those programs are one-off rebalances or a persistent directional campaign. ### Is there a TICK for markets other than the NYSE? Exchanges and data vendors publish parallel internals: TICKQ for NASDAQ issues, and various vendor-computed tick internals for other universes. Each inherits its listing population's quirks, TICKQ skews toward the technology-heavy NASDAQ crowd, so thresholds calibrated on one do not transfer to another. Crypto and FX lack a central tape, so no true TICK exists there, only venue-specific approximations. ## Implementations in the Library - TICK Arbitrage Toolkit (LuxAlgo): https://www.luxalgo.com/library/indicator/tick-arbitrage-toolkit/ ## Related concepts - Advance/decline Internals: https://www.luxalgo.com/library/concept/advance-decline-internals/ - Up/down Volume: https://www.luxalgo.com/library/concept/up-down-volume/ - % Stocks Above 20/50/200-day MA: https://www.luxalgo.com/library/concept/percent-stocks-above-20-50-200-day-ma/ - New Highs − New Lows: https://www.luxalgo.com/library/concept/new-highs-new-lows/ - Equal-weight vs Cap-weight Ratio: https://www.luxalgo.com/library/concept/equal-weight-vs-cap-weight-ratio/ - Participation Divergence at Index Highs: https://www.luxalgo.com/library/concept/participation-divergence-at-index-highs/ - TRIN: https://www.luxalgo.com/library/concept/trin/ - McClellan Oscillator: https://www.luxalgo.com/library/concept/mcclellan-oscillator/ - Breadth Thrusts: https://www.luxalgo.com/library/concept/breadth-thrusts/ - Sector Breadth: https://www.luxalgo.com/library/concept/sector-breadth/ --- Source: https://www.luxalgo.com/library/concept/tick-index/ (LuxAlgo Library, the encyclopedia of trading & technical analysis). Free to use with attribution: https://www.luxalgo.com/library/license/