What Is Rolling Backtesting? Why Is One Out-of-Sample Test Still Not Enough to Prove a Strategy Is Reliable?

Passing a single out-of-sample test does not mean a trading strategy will remain effective in all market conditions. A particular period may happen to favor the strategy, so we also need rolling backtesting to observe its performance across different time periods.

First, what is rolling backtesting?

Rolling backtesting involves repeatedly using past data, in chronological order, to develop or optimize a strategy, then testing its performance on a subsequent period of data that was no

What Is Order Book Depth? Why Can a Large Order Cause Significant Price Fluctuations When Liquidity Is Low?

In cryptocurrency trading, orders of the same size can produce completely different execution results under different market conditions. Sometimes a large order enters the market with little impact on the price; at other times, a single order can drive the price up or down quickly. One key factor behind this is order book depth.

First, what is order book depth?

The order book shows limit buy and sell orders placed by traders at different prices. Order book depth reflects the quantity

What Is Cross-Exchange Arbitrage? Why Can Price Differences Between Two Platforms Be Offset by Transfer Time and the Cost of Tying Up Capital?

The same crypto asset may be quoted at different prices on different exchanges. Traders can try to buy on the platform with the lower price and sell on the one with the higher price to capture the spread. But this seemingly simple strategy is also affected by fees, transfer speed, and market volatility.

First, what is cross-exchange arbitrage?

Cross-exchange arbitrage involves trading on price differences for the same asset across different platforms

$SNDK After surging 13.69% the previous day, it turned around and fell 4%! SanDisk’s price action is making things tough for those who chased the rally.

SanDisk closed at $937.46 on November 12, with an intraday low of $869.46 and trading volume of about 13.26 million shares. Such large price swings point to a serious divergence among investors.

But SanDisk’s fundamentals are not bad.

Its latest quarterly revenue was $11.031 billion, up 23% quarter over quarter, with its data center business growing 61%. Demand for storage driven by the expansion of AI computing capacity is clearly showing

My positions have taken a huge hit over the past few days, so I’m just finding some humor in the misery with these memes and videos of Old Huang.

GM CT, happy Friday.
@primus_labs is working on a simple problem,how to prove information is genuine without exposing private details.
From financial records to online activity, users should be able to verify what matters without sharing everything behind it.
That is important for building applications people can use without giving up control of their personal information.
Have a productive day fam.

Why Should You Reduce Trading Risk After a Losing Streak Instead of Rushing to Make Back Your Losses?

In cryptocurrency trading, a losing streak not only reduces account funds but can also impair a trader’s judgment. When people rush to break even, they often increase leverage, take larger positions, or even abandon their original trading plan, turning one loss into an even greater risk.

First, a losing streak can trigger emotional trading.

After a loss, people may be eager to prove they were not wrong or to restore their account balance as quickly as possible. This mindset can lead to impu

What is a moving average system? Why can moving averages across different timeframes help us observe trends, yet also produce lagging signals?

In cryptocurrency trading, prices fluctuate every day, and short-term rises and falls can easily cloud judgment. Moving averages calculate the average price over a set period to help traders observe market direction. But because moving averages are calculated from historical prices, they are better suited to helping identify trends than to accurately predicting the future.

First, what is a moving average system?

A moving average (MA) is a curve forme

Tonight's U.S. PPI data could be one of the most important things for the market to watch in the near term.

First, a quick explanation of what PPI is.

PPI, or the Producer Price Index, measures changes in the prices domestic U.S. producers receive for goods and services. Simply put, it tracks inflationary pressure from the production side.

It mainly covers several major categories:

Energy: crude oil, natural gas, gasoline, electricity, and more.

Food: agricultural products, meat, grains, and processed food products.

Goods: industrial raw materials, metals, machinery and equipment, electr

$DODO Bearish momentum is strengthening! Sellers may push the price down toward $0.0240... Entry zone: $0.0265–$0.0270 Take profit 1: $0.0258 Take profit 2: $0.0250 Take profit 3: $0.0240 Stop loss: $0.0283 After encountering strong resistance near $0.0295, DODO is showing signs of weakness. The price is forming lower highs, and sustained selling pressure could lead to another drop toward $0.0240.

🚨 $BTC just crashed below $69,000 — and $1.41 BILLION in leveraged positions got wiped out in 24 hours
Bitcoin fell ~6.8% to an intraday low near $68,660, breaking below $70,000 for the first time since August. $ETH dropped below $2,000 for the first time since August too, and the whole crypto market is down almost 8% in a day.
The damage: 172,922 traders liquidated in 24 hours, 89% of them longs — including a single $31M long wiped out on Hyperliquid. $622M was liquidated in just 4 hours as the $70K level gave way.
Why it matters: this isn't one headline — it's a pile-up. US spot Bitcoin ETF

A whale just dumped 16,700 $ETH ($31M) in a single trade at $1,852.45.
A month ago, the whale FOMO-bought 8,631 $ETH ($23.7M) at $2,749.
Classic buy high, sell low!

My positions have taken a big hit these past few days, so these pictures and videos are all I have to find some humor in the misery.

Today, $AKE pumped 83%
Currently price is entered cooling phase, Short correction is Possible towards 0.0042 - 0.004 😬

If you really have a neighbor like this,
you must have done good deeds in a past life!

What Is Position Sizing? Why Can Oversized Positions Force You Out of the Market Early Even When Your Trading Strategy Has an Edge?

In cryptocurrency trading, getting the direction right is important, but how much capital you put into each trade also determines whether your account can survive in the long run. Even a strategy with positive expected returns can lead to losses that are difficult to recover from if your position is too large and an unexpected price move or a string of losses occurs.

First, what is position sizing?

Position sizing is the process of deciding how much capital to

#黄仁勋辞职 Jensen Huang resigns, CFO takes over on an interim basis, $NVDA perpetuals fell 9.79% to 158 yesterday, then bounced back to 164.79 (+2.30%) today. I haven't touched my small position—this move looks more like a sentiment dip triggered by the news. As for long-term valuation, the CUDA ecosystem he built himself and the orders aren't going away just because a new CEO takes over. The earnings report on the 17th will speak for itself. AI stocks will definitely be dragged around in the short term, but demand for the leaders is right there. I'm watching, not chasing; I wouldn't touch levera

🚨 $BTC .D plunged sharply!!! Is altcoin season starting?
OF COURSE NOT!!!!!
It would be wrong to immediately interpret this drop in Bitcoin dominance as the start of altcoin season. $BTC It increased its dominance as it rose from 67K to 75K. Now it’s giving back some of the share it gained during that rally.
So, which projects could stand out when a real altcoin season begins?
I’m taking another close look at the 5 projects that make up the largest share of my portfolio:
🔹 $INJ
🔹 celestia:native
🔹 $ETHFI
🔹 $AVAX
🔹 ethereum:0x57e114b691db790c35207b2e685d4a43181e6061
We’ll examine each one