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What is look-ahead bias? Why can accidentally using future information in a backtest make an ordinary strategy look exceptionally good?

In crypto quantitative trading, a strategy’s high historical returns do not necessarily mean it has a genuine trading edge. If information that was not yet available at the time is used during a backtest, it can create look-ahead bias, allowing the strategy to know what will happen in advance and produce results that cannot be replicated in real-world trading.

First, what is look-ahead bias?

Look-ahead bias occurs when future information is incorrectly used

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In the cryptocurrency market, there isn’t a clear upward or downward trend every day. Often, BTC fluctuates repeatedly within a price range, pulling back after rising to a certain level and bouncing after falling to a certain level. This is called a ranging market.

Many traders chase rallies and sell off in a panic during ranging markets. As a result, the market fails to move in either direction, while fees and consecutive stop-losses keep eating away at their account balances. So how should you trade a ranging market?

First, range trading. Look for buying opportunities near relatively clear

In the cryptocurrency market, many people look for trading opportunities every day, but few take the time to make a trading plan. They go long when they see BTC rising and short when they see the price falling. When the market moves slightly against them, they start doubting their judgment. This kind of planless trading can easily lead to repeated losses.

So, what should an effective trading plan include?

First, define your trading direction. Before entering a trade, analyze whether the market is rising, falling, or ranging. Don’t decide based on a single candlestick.

Second, identify your

Can Nvidia hold onto its gains at the open? Only if Nvidia stabilizes and US stocks stay in the green can they drive Bitcoin higher in a rebound.

Yesterday, Nvidia dragged the entire AI sector down at the open, and Bitcoin followed. Developments during the opening session triggered concentrated selling. Bulls stayed on the sidelines, and prices quickly broke lower. By the close, the most panic-inducing bearish news had been exhausted; everyone who was going to sell had sold, and dip-buyers stepped in. Nvidia opened lower and closed higher.

AMD, which took in funds flowing out of Nvidia yeste

What Is Market Depth? How Can You Tell Whether the Order Book Can Handle Your Trade Size?

In crypto trading, many people look at price and trading volume first, but overlook a metric that directly affects trade execution: market depth.

Market depth can help us understand how many buy and sell orders are available at different price levels, and how prices might change when the market faces a trade of a certain size.

First, what exactly is market depth?

In an order book, buy orders are usually distributed across different price levels below the current market price, while sell orders are dis

I won't short $BTC here. At least not at this price. After that brutal crash, $BTC is finally showing signs of recovery. Buyers are starting to step in, and the $68,000 support area has held up quite well. I think if buyers continue to defend this level, this could be the bottom. My next target is $71,200, and I think there's a large liquidity zone above the price. We all know how much the market loves liquidity. I expect $BTC to move toward that level before deciding on its next direction. Be careful shorting here. You could end up being the liquidity the market is looking for.

🇨🇳 Chinese Version

Many people see Bitcoin plunge and their first reaction is to buy the dip. But what is truly dangerous is often not missing the absolute bottom, but rushing to invest all your capital before the market has stopped falling.

So, how can you tell whether the market is truly nearing a bottom?

First, watch the downward momentum. If the price continues to make new lows but falls noticeably more slowly, selling pressure may be easing. Second, watch key support levels. If the price tests the same area repeatedly without falling much further, there may be some buying support the

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What Is the Funding Rate? Why Can Holding a Perpetual Contract Also Generate Ongoing Extra Costs?

In the cryptocurrency market, some traders get the direction right but find their final returns are lower than expected. In addition to fees and slippage, there is another easily overlooked factor: the funding rate.

The funding rate is a mechanism in perpetual contract markets that helps keep contract prices linked to spot market prices. It can affect the cost of holding a position and whether traders are willing to hold a position in a particular direction over the long term.

First, what exact

Many traders see BTC trading volume suddenly surge and assume the market is about to reverse. In reality, a spike in trading volume does not necessarily mean a trend reversal. It more often indicates that market participation is increasing, and that disagreement between buyers and sellers may be intensifying.

So, how should we interpret a sudden surge in trading volume?

First, rising volume during an uptrend. If prices continue to rise while trading volume keeps increasing, it indicates high market participation and may mean new capital is entering. But if prices are finding it increasingly

Many traders focus only on BTC price movements when analyzing the market, while overlooking the information conveyed by trading volume and technical indicators. In fact, sometimes the price still appears to be rising, but upward momentum within the market may already be weakening. This phenomenon is called a price-volume divergence.

So, how should you read a price-volume divergence?

First, bearish divergence at the top. When the BTC price keeps reaching new highs, but trading volume gradually declines, or indicators such as RSI and MACD fail to reach new highs in tandem, it may indicate that

What does it mean when price falls, trading volume increases, and OI rises at the same time?

In crypto futures markets, if prices continue to fall while trading volume increases and open interest (OI) also rises, many traders immediately conclude that bears are dominating the market and the decline may continue.

This interpretation has some value, but it should not be treated as a definitive trading signal. The combination of these three indicators needs to be understood in the context of market structure and actual trading activity.

First, what does a price decline mean?

A price decline m

$NG ‌
Looking at the 1-hour NG (Natural Gas) chart, the market structure recently transitioned from a bullish impulse (pushing from a low of 3.570 up to a peak of 3.694) into a bearish corrective phase. The K-line analysis shows a clear rejection at the 3.694 high, followed by a series of lower highs and lower lows. Price has now broken below the middle Bollinger Band (MB: 3.643) and is riding the lower half of the channel, currently resting at 3.616, just above the lower band (LB: 3.591). The WMA lines (5, 10, 20) are compressing and flattening, signaling a loss of bullish momentum, while th

Many traders pay particular attention to their win rate when they enter the market. They hope to win 7 or 8 out of every 10 trades, and may even believe that only a high win rate can deliver consistent profits.

But in reality, what determines whether an account can grow over the long term is often not just the win rate, but also a frequently overlooked metric: the risk-reward ratio.

What is the risk-reward ratio?

Simply put, the risk-reward ratio is the proportion between the expected profit and potential loss on a trade.

For example, if a trade has a 100 USDT stop-loss and a 300 USDT take

#BTCDown4%

BTC Down 4% and Then Further: What Is Behind Bitcoin’s Sudden Sell-Off?
Imagine checking your Bitcoin portfolio in the morning and finding that its value has dropped sharply overnight. You open the chart, see a strong red candle, and wonder whether this is a temporary correction or the beginning of a deeper market decline.

That is the situation Bitcoin traders are facing on November 13. What started as a roughly 4% daily decline has developed into a much stronger sell-off, raising important questions about market sentiment, forced liquidations, and what could happen next.

What

No way this is real. No one would do "Thomas the Train" plastic surgery.
Hey @grok, is this AI?