Max Koh

One-sided bets too risky? Vertical spreads help you cap maximum losses, boost capital efficiency, and achieve controlled risk with steady returns in options trading.

Which is better: buying or selling options? This article uses implied volatility (IV) ranges (low, medium, high) as the main framework, integrating IV Rank, Greeks, and risk management for a one-page layered comparison to aid scientific decision-making.

An in-depth analysis of the Put/Call Ratio as a sentiment indicator in US, A-share, and Hong Kong stock markets, its practical applications, limitations, and risks, along with best practices for multi-signal resonance and risk management.

How to choose between options and futures? This article provides a detailed comparison of rights and obligations, margin and leverage, profit and risk structures, costs, delivery and settlement, and unique features of the Chinese market, helping you make informed decisions in 2025.

A detailed guide to correctly interpret trend strength with ADX+DMI, set 20/25/40 thresholds, reduce false entries during consolidation periods, and improve real trading success rates.

This article tells you where to find NVIDIA's financial reports, how to read them, and how to analyze them. It introduces the structure of financial reports, key metrics, and competitive comparisons, suitable for long-term reference by investors or tech enthusiasts.

When to sell stocks? Sell when the company's fundamentals deteriorate, the stock price breaks key technical levels, or it hits your preset profit-taking or stop-loss targets. This article analyzes these three core signals, providing actionable rules based on performance, trend lines, and drawdown ratios to help you build a disciplined selling system and avoid emotional decisions.

This article provides a detailed introduction to the limit rules of Western Union remittances, including different account levels, remittance methods, agent policies, international regulations, and verification processes.

Is Stripe safe? The answer is yes. Stripe holds the highest level of PCI DSS Level 1 certification in the payment industry, providing bank-level security guarantees for millions of businesses worldwide through end-to-end encryption and intelligent fraud detection systems, ensuring every transaction is secure and worry-free.