0DTE Scalper

No. Singapore options have monthly expirations only. True 0DTE is only available once per month on the expiration day (2nd last business day of month). US markets like SPY have daily expirations enabling daily 0DTE trading.

For long options (calls or puts), you can lose 100% of the premium paid. The option can expire worthless. For spreads, max loss is defined. For naked short options, losses can be unlimited. Always assume you can lose everything risked.

The extreme gamma means small stock moves create large percentage gains. A 1% stock move can result in 100%+ option gain. Traders with good directional timing and strict risk management can profit. However, most retail 0DTE option buyers lose money.

No. 0DTE is for experienced traders only. Start with longer-dated options to understand Greeks and option behavior. 0DTE requires fast decision-making, strict discipline, and ability to accept frequent losses.

For equity options (DBS, etc.), ITM options may be exercised and you'll receive/deliver shares. For index options (STI), they're cash-settled. Close before expiration to avoid assignment uncertainty.

Estimate: (1) How much must stock move for your option to profit after theta decay? (2) What's the probability of that move? (3) Is the risk/reward acceptable? For example, if you need 0.5% move to profit and you believe there's 60% chance, it may be worthwhile.

ATM has maximum gamma but costs more. OTM is cheaper (less at risk) but needs bigger move. For most scalps, ATM or slightly OTM (1-2 strikes) offers best balance of gamma and cost. Deep OTM is usually a poor choice.

Spreads reduce cost and define risk, which is valuable given the extreme nature of 0DTE. Tradeoff is capped profit. Use spreads when you want lower cost exposure or have a specific price target in mind.

Generally 10 AM - 2 PM is best. The first 30 minutes can be volatile with wide spreads. Afternoon sees accelerating theta decay. Avoid the last hour unless experienced - it's unpredictable and theta decay is extreme.

Have a predetermined stop (30-50% loss or price level). Execute it without hesitation. On 0DTE, losers often go to 100% loss. Cutting early preserves capital for the next trade. Never hope for recovery without a plan.

Define: (1) Entry signals (technical levels, patterns), (2) Filters (volume, spread width, time), (3) Position sizing rules, (4) Exit rules (stop, target, time), (5) Daily limits. Log every trade. Calculate expectancy. Refine based on data. Backtest if possible.

Market makers delta-hedge continuously as gamma creates delta changes. They're short gamma (from selling to retail) and manage by hedging in the underlying. On 0DTE, hedging is frequent and contributes to stock movement and pinning effects.

Pin risk occurs because market maker hedging creates buying below strike and selling above, gravitating stock toward strike. Trade around it by: (1) Avoiding positions that need stock to be at specific price, (2) Closing before close, (3) Using pin as a target for butterflies.

Less accurate than normal. The assumption of continuous price movement breaks down. Prices can jump. Bid-ask spreads are wide. Greeks are estimates. Experienced traders rely more on price action and intuition than models on 0DTE.

Most use fixed dollar (e.g., S$500/trade) or fixed % (1% of portfolio). Kelly Criterion can mathematically optimize but is aggressive. Given high loss frequency, fractional Kelly (0.25-0.5×) is more practical. The key is sizing so that inevitable losses are survivable.