Support & Resistance Calculator

What Makes Levels Matter

Support and resistance aren't just lines on a chart—they're psychological battlegrounds where buyers and sellers clash. Our signals target flips of key daily and weekly support/resistance levels. When a previous support level breaks, it often becomes new resistance, and vice versa.

• Volume Confirmation: High-volume breaks are more reliable than low-volume fakeouts. Look for 50%+ above average volume on breakouts.
• Multiple Touches: Levels tested 3+ times gain significance and attract more trader attention—making the eventual break or bounce more powerful.
• Round Numbers: SPY 400, 420, 450—psychological levels where algorithms and retail traders cluster orders, creating strong support/resistance.
• Time Spent at Levels: The longer price consolidates at a level, the more significant the eventual breakout or breakdown becomes.

Daily vs. Weekly Levels

Different timeframes reveal different opportunities and require different trading approaches:

• Daily Support/Resistance: Previous day's high/low, pivot points, and intraday swing levels. Best for 0DTE scalps and same-day momentum reversals.
• Weekly Levels: Prior week's range, monthly opens, quarterly levels. These hold more weight for multi-day swings and position trades.
• Gap Fills: SPY has a strong tendency to fill overnight gaps. Mark gap levels as potential price magnets within 1-5 trading sessions.
• Moving Averages: 20-day, 50-day, and 200-day MAs act as dynamic support/resistance, especially effective during pullbacks in trends.
• VWAP Levels: Volume-weighted average price serves as intraday support/resistance—price above VWAP is bullish, below is bearish.

Role Reversal Strategy

The bread and butter of support/resistance trading—when levels flip roles and create high-probability setups:

• Broken Support → New Resistance: SPY breaks below 420 support on volume? Watch for bounces back to 420 to fail as new resistance—perfect short entry.
• Cleared Resistance → New Support: SPY powers through 430 resistance? Look for dips back to 430 to hold as new support—ideal long entry on retest.
• Retest Timing: Most role reversals happen within 1-3 trading sessions. After that, the level loses potency and becomes less reliable.
• Volume Pattern: Strong breakouts should see declining volume on retests—this shows conviction in the new direction and validates the role reversal.
• Confirmation Candle: Wait for a strong rejection candle (long wick) at the retested level before entering—confirms the level is holding its new role.

Essential S/R Tools

Mark these critical levels on your SPY charts every trading day:

• Previous Day High/Low: Most watched intraday levels by institutional traders. Clean breaks often signal strong continuation moves.
• Weekly Pivot Points: Calculated as (H+L+C)/3 from prior week. Classic institutional reference points used by market makers.
• Gap Levels: Mark any overnight gaps >0.5%. SPY has a 70%+ gap fill rate within 5 sessions—high-probability mean reversion trades.
• Volume Profile: Identify high-volume nodes (HVN) and low-volume nodes (LVN) for stronger support/resistance zones where institutions accumulated.
• Options Strikes: Check max pain levels and high open interest strikes—these act as price magnets near monthly expiration (OpEx).
• Fibonacci Retracements: 38.2%, 50%, and 61.8% retracements of major moves often coincide with strong support/resistance levels.

Pro Trading Tips

• Confluence Zones: The most powerful levels have multiple factors aligning—pivot point + 50 MA + round number = high-probability zone.
• False Breakouts: 30% of breakouts fail. Wait for a retest or second breakout attempt before committing large size.
• Premarket Levels: Watch how SPY reacts to key levels in premarket—acceptance above/below often predicts regular session direction.
• Options Flow: Large call walls create resistance, large put walls create support. Track unusual options activity at key strikes.
• Market Structure: Higher highs + higher lows = uptrend (buy support). Lower highs + lower lows = downtrend (sell resistance).