Previous Day High/Low

Most charting platforms have a 'Previous Day High/Low' indicator or study you can add. Alternatively, you can manually look at yesterday's daily candle to see the high and low prices. Only use regular session hours (9:30 AM - 4:00 PM ET), not extended hours.

Generally, no. Use only regular trading hours (9:30 AM - 4:00 PM ET) for PDH/PDL. Extended hours have much lower volume and may create extreme levels that aren't relevant to the majority of traders.

Not every day tests PDH/PDL. If price stays in the middle of the prior range, there's no setup. Wait for price to approach the levels. Some days are inside days where the range contracts - PDH/PDL may not be tested at all.

PDH/PDL works best on liquid stocks with clear daily ranges - SPY, QQQ, mega-caps like AAPL, MSFT. Avoid low-volume stocks where PDH/PDL may be random noise. The concept also works well on futures (ES, NQ).

PDH/PDL trades can be intraday or multi-day. If you're day trading, close by end of day. If swing trading, you might hold a breakout above PDH for several days targeting higher levels. Define your holding period before entering.

Market context helps: In trending markets (strong up or down), favor breakout trades in the trend direction. In ranging/choppy markets, favor reversals as levels are more likely to hold. Also consider the quality of the approach - Strong volume approaching suggests breakout; weak volume suggests reversal.

When PDH aligns with another level (pivot, round number, moving average), it creates confluence - A much stronger level. Be more confident in trades at this level. Breakouts through confluence are more significant; reversals at confluence are higher probability.

A gap above PDH is bullish - It means overnight buyers were willing to pay more than yesterday's high. PDH now becomes support, not resistance. Look to buy pullbacks to PDH. Don't short at PDH when price has gapped above it.

No, be selective. Best setups have: (1) Market alignment (SPY direction), (2) Volume confirmation, (3) Clear candlestick signals, (4) First test of day (often strongest). Skip low-quality tests without confirmation.

Neither is inherently more reliable - It depends on context. In uptrends, PDL bounces are more reliable (with-trend). In downtrends, PDH rejections are more reliable. First test of either is often most significant.

Steps: (1) Collect data on all PDH/PDL tests over 2+ years (gap, time, test type, volume, result). (2) Analyze win rates by segment (gap direction, time, market alignment). (3) Build rules from highest-probability scenarios. (4) Backtest with realistic costs. (5) Walk-forward validate. (6) Paper trade, then live small.

For breakouts: ATM calls/puts or debit spreads (reduces cost). For reversals: ATM options in opposite direction. For range expectation: Iron condor with short strikes at PDH/PDL. Use 0DTE for day trades (high theta, need quick move), weekly for swing.

PDH failure: Price breaks above PDH then closes back below. Enter short on close below PDH. Stop above the failed high. Target PDL or lower. PDL failure: Price breaks below PDL then closes back above. Enter long. Stop below failed low. Target PDH or higher. Trapped traders fuel the reversal.

Classification models (Random Forest, XGBoost) predicting break vs hold at level. Features: Gap direction/size, prior range, volume, SPY direction, time of test. Set >65% probability threshold for trades. Walk-forward validate quarterly. Size positions by model confidence.

Plot daily PDH/PDL, weekly high/low, monthly high/low. When PDH = weekly high (confluence), it's a much stronger level. Trade these confluence zones with higher conviction and larger size. Hierarchy: Monthly > Weekly > Daily for significance.