Trading Glossary M–O

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MACD (Moving Average Convergence Divergence) — A trend-following momentum indicator showing the relationship between two EMAs. MACD Line = EMA(12) − EMA(26). Signal Line = EMA(9) of MACD. Histogram = MACD − Signal. Bullish signal: MACD crosses above Signal. Bearish signal: MACD crosses below Signal. MACD above zero = bullish momentum. Below zero = bearish momentum. The histogram shrinking before a crossover is an early warning of trend weakness.

Margin — The amount of capital required to open and hold a leveraged position. SEBI and NSE set minimum margin requirements (SPAN + Exposure margin) for all F&O positions. Initial margin (to open the trade) is typically lower than the full notional value, providing leverage. If losses reduce your account below the minimum margin, a Margin Call is triggered.

Margin Call — A demand from the broker to deposit additional funds when account equity falls below the minimum margin requirement. If not met within the specified time, the broker forcibly closes positions — often at the worst possible moment. A common cause of catastrophic losses for overleveraged traders. Avoided by maintaining sufficient buffer capital and sizing positions appropriately.

Market Capitalisation — The total market value of a company's outstanding shares. Calculated as: Share Price × Total Shares Outstanding. NSE categorises stocks by market cap: Large-cap (top 100 companies), Mid-cap (101st–250th), and Small-cap (251st and below). Large-caps have higher liquidity, more analyst coverage, and are less susceptible to manipulation.

Market Maker — An entity that continuously quotes both buy (bid) and sell (ask) prices for a security, providing liquidity. In SMC, "Market Maker" refers to the institutional entities whose order flow drives price — their buy and sell models create predictable patterns that SMC traders use for entry and exit. NSE has registered Market Makers for certain derivatives contracts.

Market Order — An order to buy or sell immediately at the best available price. Guarantees execution but not price. In liquid NSE instruments (NIFTY ETF, Reliance, HDFC Bank), market orders fill very close to the quoted price. In illiquid stocks, market orders can result in significant slippage — paying significantly more (when buying) or receiving less (when selling) than the last traded price.

Mark-to-Market (MTM) — The daily settlement of F&O profits and losses against the closing price. Each day, gains or losses from futures positions are credited or debited from your account based on the closing price — regardless of whether you exit the position. This is why futures traders need sufficient capital buffer — a large adverse MTM settlement can trigger margin calls even if the eventual trade direction is correct.

Max Pain — The strike price at which options buyers experience maximum loss and options sellers experience maximum profit at expiry — the level where the total value of all outstanding options is lowest. Also called the Options Pain theory. Many NSE traders watch the weekly NIFTY Max Pain level as a potential magnet for expiry-week price action, as market makers theoretically benefit from price settling near this level.

Mean Reversion — The tendency of prices to return to their historical average after extreme moves. Mean reversion strategies buy when prices are abnormally low and sell when abnormally high, expecting a return to the mean. Works best in range-bound markets. RSI below 30 or price far below Bollinger Band lower are common mean reversion entry signals on NSE.

MIS (Margin Intraday Square Off) — NSE's intraday order type that must be squared off by end of trading session. MIS orders receive higher leverage than delivery (CNC) orders but are automatically squared off by the broker at approximately 3:15–3:20 PM if not manually closed. MIS positions cannot be converted to delivery if the trade goes against you.

Momentum — The rate of change in price or the tendency of a price trend to continue. High momentum stocks are outperforming on a relative basis and tend to continue outperforming (momentum factor in academic research). Momentum indicators: RSI, MACD, Rate of Change (ROC). Momentum strategies buy top-performing stocks expecting continuation. Proven to outperform the market on NSE historically.

Moving Average — A technical indicator that smooths price data by averaging closing prices over a specified period. Simple Moving Average (SMA) gives equal weight to all periods. Exponential Moving Average (EMA) gives more weight to recent prices. Common uses: trend identification (price above/below MA), dynamic support/resistance (price bouncing off MA), and crossover signals (fast MA crossing slow MA).

Mutual Fund — A pooled investment vehicle managed by professional fund managers. Equity mutual funds invest primarily in stocks. NSE equity index funds track NIFTY 50 or NIFTY 500. SIP (Systematic Investment Plan) allows regular fixed-amount investments. For retail investors who do not have time to trade actively, a NIFTY 50 index fund via SIP has historically outperformed the majority of actively managed funds over 10-year periods.

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NIFTY 50 — The National Stock Exchange's flagship index comprising the 50 largest and most liquid Indian companies by market capitalisation. It represents approximately 65% of India's total stock market capitalisation. NIFTY 50 is the primary benchmark for Indian equity returns and the most traded index futures and options contract in the world by volume. Historical CAGR: approximately 12–14% annually.

NSE (National Stock Exchange) — India's largest stock exchange by trading volume, established in 1992 and headquartered in Mumbai. NSE introduced electronic trading, derivatives, and transparent pricing to Indian markets. NSE operates the NIFTY 50 index and hosts the world's most active single-stock and index options market. Trading hours: 9:15 AM to 3:30 PM IST on weekdays.

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OBV (On Balance Volume) — A cumulative volume indicator adding volume on up days and subtracting on down days. OBV rising while price rises confirms the uptrend. OBV rising while price is flat signals upcoming breakout (accumulation). OBV falling while price rises signals upcoming reversal (distribution). A leading indicator — OBV often changes direction before price.

Open Interest (OI) — The total number of outstanding (open) derivatives contracts that have not been settled. Rising OI with rising price = new money entering, bullish. Rising OI with falling price = new shorts entering, bearish. Falling OI with rising price = short covering rally (less reliable). Falling OI with falling price = long liquidation. OI data is critical for understanding F&O market dynamics on NSE.

Options Chain — A table showing all available Call and Put options for a specific underlying, expiry date, and range of strike prices. The options chain displays premium, Open Interest, Volume, IV, and Greeks for each strike. NSE options chain is available on the NSE website. Analysing the options chain helps identify key support/resistance levels (Max OI at strikes = likely price magnets).

Order Block (OB) — A Smart Money Concepts term for the last candle before a significant institutional move. The last bearish candle before a strong rally = Bullish Order Block. The last bullish candle before a sharp decline = Bearish Order Block. When price returns to the OB zone, institutions add to their positions — creating a high-probability bounce. Order blocks are the primary entry zones in SMC trading.

OTE (Optimal Trade Entry) — A Smart Money Concepts/ICT term referring to the Fibonacci 61.8%–79% retracement zone of a recent swing as the highest-probability entry area. OTE combines the deep discount (buying well below the recent high) with institutional order flow (SMC theory suggests institutions re-accumulate in the 61.8%–79% zone). Widely used on NIFTY 50 and BANK NIFTY for positional and swing trade entries.

OTM (Out of the Money) — An option with no intrinsic value. A Call is OTM when strike price is above the current underlying price. A Put is OTM when strike is below the current price. OTM options are cheaper (lower premium) but have higher risk of expiring worthless. Deep OTM options have very low Delta and require large price moves to become profitable. Buying deep OTM options on NSE as "lottery tickets" is a reliable way to lose money consistently.

Overbought — A condition where a security has risen sharply and may be due for a correction. Commonly identified by RSI above 70, price far above Bollinger Band upper, or price significantly above a moving average. Overbought does not mean "sell immediately" — in strong trends, stocks can remain overbought for weeks. Best used at key resistance levels as a confirmation of potential reversal, not in isolation.

Oversold — A condition where a security has fallen sharply and may be due for a bounce. Identified by RSI below 30, price below Bollinger Band lower band, or price far below a moving average. Like overbought, oversold does not guarantee an immediate bounce — in strong downtrends, stocks can remain oversold. Use at key support levels or with bullish divergence for higher-confidence reversal signals.