Glossary
Plain-language definitions of the crypto-derivatives and Vietnamese-market terms Sóng tracks. Descriptive, not advice.
Crypto derivatives
Funding rate
The periodic payment exchanged between long and short holders of a perpetual futures contract.
Open interest (OI)
The total value of derivatives contracts currently open and not yet closed.
Basis
The gap between a futures price and its underlying spot or index price.
Long/short ratio
The balance of trader accounts or positions on the long side versus the short side.
Liquidation
The forced closing of a leveraged position when its margin runs out.
Perpetual futures
A futures contract with no expiry date, kept near spot by funding payments.
Technical indicators
RSI (Relative Strength Index)
A momentum oscillator (0–100) that flags overbought and oversold conditions.
MACD
A trend-and-momentum indicator built from the gap between two moving averages.
Bollinger Bands
A moving average wrapped in volatility bands a set number of standard deviations away.
Moving average (MA)
The average price over a rolling window, smoothing noise to show the trend.
Volume
How much of an asset traded over a period; a gauge of conviction behind a move.
On-chain flow
Stablecoin flow
The minting, burning and movement of stablecoins like USDT and USDC as a proxy for crypto buying power.
Whale trade
A single trade large enough in notional value to move or signal the market.
Exchange flows (netflow)
Coins or stablecoins moving into or out of exchange wallets, netted over a window.
Exchange reserves
The standing balance of stablecoins or coins held in exchange wallets.
Vietnamese market
VN30
The index of the 30 largest, most liquid stocks on the Ho Chi Minh exchange (HOSE).
VN30F
Futures contracts on the VN30 index; VN30F1M is the front (nearest) month.
Price band
The daily percentage limit a Vietnamese stock's price may move up or down.
Foreign room
The remaining share of a Vietnamese company that foreign investors are still allowed to own.
ATO / ATC (periodic matching)
The opening and closing call auctions that set a Vietnamese stock's open and close price.
T+ settlement
The delay between trading a Vietnamese stock and actually receiving it in your account.
Round lot (lô)
The standard trading unit on Vietnamese exchanges; odd amounts trade separately.