r/highfreqtrading
15k members
r/highfreqtrading is a subreddit with 15k members. The community frequently discusses hft, trading, data, crypto, and market making, and the most common flair used is code, question, paper, career, and commodities.
The r/highfreqtrading subreddit is a place for people of all backgrounds to join in informed discussion around high-frequency trading systems with an emphasis on sharing direct expertise and firsthand knowledge.
Popular Topics in r/highfreqtrading
#1
Hft
78 posts
#2
Trading
27 posts
#3
Data
15 posts
#4
Crypto
12 posts
#5
Market Making
12 posts
#6
Market
10 posts
#7
Latency
9 posts
#8
Fpga
8 posts
#9
System
8 posts
#10
C++
6 posts
Flair Used in r/highfreqtrading
#1
Code
: "I built a high-performance Rust Matching Engine with real NASDAQ ITCH replay — 98ns p50, 28M ops/sec"
5 posts
#2
Question
: "Resource for HFT interview prep"
4 posts
#3
Paper
: "That "square-root law" and trade-sign memory thing you've heard about? Turns out they were never talking about the same clock. New paper explains why."
2 posts
#4
Career
: "Embedded Engineer Fascinated by Timing and Optimization — Is HFT the way to go ?"
2 posts
#5
Commodities
: "I only talk about what I experience."
2 posts
#6
Video
: "Building an HFT chip (FPGA)"
1 post
#7
Criticism
: "Implemented an HNSW Vector Database in C++ with AVX2 SIMD (99.3% Recall@10 on SIFT1M) , Seeking architectural feedback on concurrency model"
1 post
#8
Equities
: "Using recovery cycle pattern of my Algo to capture the winning streak"
1 post
#9
Crypto
: "DCA allocation engine with 7-layer safety pipeline — curious how others handle correlation-to-1 market events"
1 post
Member Growth in r/highfreqtrading
Yearly
+4k members(37.5%)
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Last updated: July 12, 2026