We use the Django framework for most of our web apps (in house scanners) as it encourages rapid development & clean, pragmatic design.
3) Python
Python is extensively used for backtesting as various open-source modules like pandas, NumPy, Talib, Backtrader, FFN, Matplotlib, and many more data analytics & visualization tools are built on top of it.
Python helps us in analysing large datasets in a easy way
4) Postgres DataBase:
Postgres database nodes to store and retrieve a gigantic amount of data our market data API’s fetches from the exchange in real-time
Data across multiple instruments, across multiple expiries,across multiple strikes for last many years is stored
5)Machine Learning:
Bit of ML to optimise entry & exit conditions of specific systems
Decision Trees are employed to split data continuously according to a certain parameter.
Tools : Scikit-learn, TensorFLow & Keras
6)AWS Cloud Server & Digital Ocean
Used for storing all data that is generated & hosting virtual servers ( for websites & internal applications)
7a) Scheduling (Cron Job):
Under the hood of our various automated trading algos, alerts systems, risk management systems lie countless cron jobs which help schedule tasks.
Software interrupts are employed to manage synchronous events for our Algo trading bots.
7b ) Risk Management:
A master node collects all the events& logs them on a dashboard as a centralized knowledge hub for all open positions.
To keep check of an unsystematic risk event like exchange blackout etc the master dashboard provides endpoints to manually manage trades.
8) So I provided a quick & broad, overview of our stack.
In future posts, I’ll explain them in more detail & also introduce you to the tech team(not active much on twitter) & ask them to write detailed tech blog for tech geeks
$440 million vanished in 45 minutes
No crash. No panic in the markets
Just one quiet mistake at market open
This is the story of Knight Capital
A thread
1. Knight Capital wasn’t reckless or inexperienced.
They were one of the largest market makers in the U.S., executing millions of trades daily and providing liquidity to the entire market.
2. Before the market opened that day, Knight Capital deployed a new trading algorithm.
It was meant to improve performance.
One small operational error slipped through unnoticed.
Mastering the Trade - Key Lessons from John Carter
Trading isn’t about luck. It’s about discipline, risk management, and repeatable setups. Here’s what every trader should know 🧵
1) Trading is a skill, not a gamble
Success comes from strategies you can repeat, not from guessing market moves.
Control what you can do with your entries, exits, and risk.
2) Mindset is everything
Most traders fail due to emotions, not setups.
Stick to your plan
Journal every trade: why you entered, what went right/wrong, how you felt
Trading isn’t just “buying and selling stocks.”
It’s about knowing yourself, managing risk, controlling emotions, and protecting your capital.
If you’re serious about trading, study your game inside out — not just setups and profits.
A thread 🧵
Trading success isn’t about the best strategy, it’s about mastering yourself:
Discipline. Patience. Consistency.
1. Discipline – follow your plan
Successful traders stick to their rules no matter what the market does. Impulse decisions and emotional trades are the fastest way to lose. Discipline keeps you consistent.
Simple Guide to Position Sizing for Trading Success
By Van K. Tharp
A thread 🧵
1) What is Position Sizing
Position sizing is simply deciding HOW MUCH to trade. It's about protecting your money while still making profits. Think of it as your trading safety net!
2) Why Position Sizing Matters
Prevents big losses that can wipe out your account
Helps you stay in the game during losing streaks
Makes your winning trades count more
Warren Buffett nearly went bankrupt in 1962
His biggest bet was burning $4M a month. Bankruptcy was weeks away
Then a man named Harry Bottle saved his career in 6 days
The untold story of Buffett’s riskiest investment 🧵
1) Young Buffett thought he struck gold
He bet big on Dempster Mill, a struggling windmill manufacturer
Stock price: $18/share
Book value: $72/share
A 75% discount is the perfect Ben Graham-style bargain
By 1961, he owned 70% of the company
2) But the numbers were lying
Dempster made up 21% of Buffett’s fund
Cash: $166K
Debt: $2.3M
$4M of inventory sat rotting in warehouses some of it since 1909
Bankruptcy was weeks away. Buffett was trapped