OPEN-SOURCE SCRIPT

Illiquidity 1m gaps

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// WHAT IT DOES
// Detects illiquid stocks by counting how often consecutive 1-minute bars
// fail to touch each other. On liquid names trades print continuously, so
// each bar's open is essentially equal to the previous bar's close. On
// illiquid names there are minutes with zero trades, and when a trade
// finally happens it can land at a meaningfully different price - leaving
// a visible gap between bars. Many such gaps in a session is a direct
// signal of thin liquidity.
//
// The indicator runs the 1-min gap analysis even when applied to higher
// timeframes (e.g. daily). Each daily candle is annotated with the total
// number of 1-min gaps that occurred during that session, broken into
// gap-ups and gap-downs. When the count exceeds the threshold, the
// display turns red.
//
// HOW IT WORKS
// 1. Fetches 1-minute data via request.security_lower_tf(), regardless
// of the chart's current timeframe.
// 2. For each 1-min bar, compares open to the prior close.
// 3. A gap is registered when |open - prevClose| / prevClose * 100
// exceeds the configured threshold.
// 4. Session-boundary jumps (overnight, lunch break) are excluded by
// checking the time delta between consecutive bars - only bars less
// than 5 minutes apart in real time are considered.
// 5. Gaps are summed across all 1-min bars within the current chart bar.
//
// INPUTS
// - Min gap size pct: Minimum price jump (% of price) that counts as a
// gap. Default 0.10%. Increase for cheap stocks (<Rs.100 use 0.20%),
// decrease for high-priced names (>Rs.3000 use 0.05%).
// - Gaps per chart bar to flag illiquid: Threshold above which the bar
// is marked red. Suggested starting values by category:
// Nifty 50 / large caps : 10
// Mid caps : 20 (default)
// Small caps : 35
// Microcaps / SME : 60+
// - Show on chart (table): Toggle the corner table.
// - Show in status line: Toggle the three numbers in TradingView's
// status line (Total / Up / Down).
// - Table position: 9-way position picker (top/middle/bottom x
// left/center/right).
// - Text size: Tiny / Small / Normal / Large.
//
// DISPLAY
// - Table shows: "<total>g <up>u <down>d" e.g. "14g 8u 6d".
// - Status line shows the same three numbers as separate plot values.
// - Background of the readout flips red when total >= threshold.
//
// LIMITATIONS
// - TradingView caches a limited amount of lower-timeframe history. On
// a daily chart pulling 1-min data, typically only the most recent
// 10-40 trading days will populate accurately. Older bars may show
// zero gaps because the 1-min data is unavailable, not because the
// stock was liquid.
// - Free/Basic plans have stricter intrabar limits than paid plans.
// - Works best on equity instruments with regular sessions. For 24/7
// markets (crypto), the session-boundary filter is unused.
//
// USE CASE
// Screen out illiquid stocks before adding them to a watchlist or sizing
// into a position. Apply this indicator to your daily chart, glance at
// the corner readout, and skip any name flagged red - the spread and
// slippage on those will eat your edge.
//
// CALIBRATION
// Apply to three reference tickers on your daily chart:
// - A known liquid name (RELIANCE) - should read ~0-5 gaps.
// - A midcap you actually trade - note the typical count.
// - A microcap or SME - should read 50+.
// Set your threshold to roughly 2x the typical count of your tradeable
// midcap.
// =============================================================================

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