TickDB API development tutorials, WebSocket integration and SDK examples
The moment you try to subscribe to 150 symbols simultaneously over a single WebSocket connection, the system starts lying to you. Not maliciously — but consistently. Heartbeat messages get delayed bec
--- Price is the effect. The underlying model is the cause. Two quantitative trading teams run similar mean-reversion strategies on US equities. Team A pays $2,400 per month on a flat-rate plan but le
--- Price is the effect. The order book is the cause. That phrase hung on my monitor for three weeks when I started building my first quant strategy. I had spent eight years as a software engineer, wr
--- The Audit That Changed Everything The quant team had been running the same mean-reversion strategy for eighteen months. Sharpe ratio: 1.42. Max drawdown: −6.3%. Everything looked clean on paper. T
--- "I set up my strategy at 11 PM on a Sunday. By Monday morning, it had stopped collecting data at 3:47 AM because the process crashed silently. I lost the entire Asian session." This is the most co
The problem with correlation matrices is that they tell you what happened, not what might happen next. A Pearson correlation of 0.82 between NVIDIA and Taiwan Semiconductor tells you these two assets
--- A strategy that returns 23% in backtesting and 8% in live trading is not a bad strategy. It is a strategy with a slippage problem. For three months, the quantitative team at a mid-size hedge fund
--- > "The most dangerous moment for a quant strategy is not when the market moves — it is when the market doesn't move." Imagine running a backtest on a mean-reversion strategy across S&P 500 constit
The first rule of quantitative research: garbage in, garbage out. Every quant trader who has ever run a backtest that looked spectacular on paper only to hemorrhage money in live trading has traced th
--- The Morning I Realized I Was Paying to Trade It was 3 AM. I was staring at a brokerage statement that showed my algorithmic strategy had made $47.82 in profit — and cost $89 in data subscriptions.
--- The Moment Everything Breaks It is 2:47 AM. Your backtest is humming along at 3,200 requests per hour, processing five years of minute-bar data across 847 symbols. The strategy has been running cl
When an AI assistant responds to a user's query about NVIDIA's after-hours volatility, it needs more than a vague description of your API. It needs a precise contract: what parameters exist, what data
The Hidden Cost of a Growing Strategy Library A portfolio of five strategies feels manageable. A portfolio of twenty is a liability waiting to materialize. The problem is rarely the quality of individ
Data synchronization sounds straightforward until it isn't. A system that pulls new records daily works beautifully — until a source system retroactively modifies a historical record. A pipeline that
--- "Price is the effect. The order book is the cause." Every quant developer who has worked with market data has hit this wall eventually: you find a clean API, the documentation looks solid, you wri
You have a mathematics degree, you know Python, and you've read all the popular quant finance books. You believe you are ready to apply for quantitative researcher positions. Then you open a job descr
--- You are running 2,000 coroutines. Every 50 milliseconds, they hit an external API, collect market data, and aggregate results. At 2:47 AM, your system receives a shutdown signal. You have approxim
--- "Price data is only as reliable as its gaps." A quant researcher runs a mean-reversion backtest on 10 years of S&P 500 data. The strategy looks phenomenal — Sharpe of 1.8, max drawdown under 6%. T
"Price is the effect. The order book is the cause." Every quant strategy begins with the same problem: how do you turn a vague idea — "buy when the short-term average crosses above the long-term avera
--- Every quant researcher has a story like this. A researcher spends three weeks building a mean-reversion strategy. The backtest looks exceptional — 2.4 Sharpe, max drawdown under 12%. They allocate