Why do many trading strategies perform consistently in backtests, then suddenly fail when market conditions change?

A trading strategy may have been profitable for several months.

It may perform well in trending markets, with a beautiful backtest curve. But when the market enters a range-bound phase, or liquidity suddenly drops, signals that once worked may start failing frequently.

At that point, many people’s first reaction is: Were the parameters not tuned properly?

But the problem may have nothing to do with the parameters. Instead, the market conditions the strategy depends on to make

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The market suffered a sharp downturn last night, and today we saw a fairly strong rebound, with U.S. stocks and crypto markets rising in tandem. But I want to remind everyone: this is not the time to chase the rally. This rise is essentially just a technical recovery from oversold conditions, not a trend reversal. Take Ethereum, for example: $ETH is currently trading around 2070, right within the 2000-2150 range I gave earlier. My strategy is clear: patiently wait for the price to move convincingly above 2100 before considering looking for shorting opportunities. Risk warning: The above refle

Feast has launched a new mode. Just like Pin Hao Coin 🤣
You had to sign up to get in, and it’s already underway
I don’t understand how it works. It’s not exclusive to agents
Even regular wallets can participate, but now I can only watch from the sidelines.

November’s trading month has quietly passed the halfway point, and the overall market environment has fully recovered. This is the most comfortable and easiest-to-navigate trend window of the second half of the year!

The market’s pace over the past two months has matched our expectations exactly. The prolonged, dull consolidation has come to a complete end, and the market is seeing an explosive breakout in structural trends.
Bitcoin, Ethereum, gold, SNDK, ZEC, and other major assets have taken turns gaining momentum, each delivering clear one-way moves. Entry signals are clear, trends have st

$BTC The recent market action has been absolutely brutal. Bitcoin has posted five consecutive red weekly candles. If it closes below $748239 this week, that will make six in a row.

Since I’m holding nothing but long positions, I’ve suffered extremely heavy losses over the past five weeks. Last night I came close to liquidation, and when I tried to buy U late at night, Alipay’s risk controls kicked in—I couldn’t buy any at all! With only three digits left in my margin, I had no choice but to short Bitcoin at the rock-bottom price of $73300, and only managed to make it through to today by hedgi

$AGT This afternoon, it surged from 0.025 straight to 0.064, more than doubling, then a single candle dumped it back to 0.037 at 9 p.m.
The perpetual contract price is now rebounding around 0.045, with swings of tens of percent in both directions—those chasing the move are getting hit from both sides.
Long liquidation levels are densely clustered around 0.035 below, with another cluster at 0.027-0.030.
Above, 0.062 is the largest short liquidation level, also around today's high.
With this kind of violent pump and dump, how long do you think this rebound can last? Share your thoughts.

Great, $HANA has started rising again. The uptrend is stable, and the risk of being stopped out is low, so I feel comfortable going long too. Strongly bullish 😍😍😍$AGT $ERA 😍😍😍

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$BTC $SOL $XAU

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Would you still dare touch MU at $775?
From $1,255 down to $700, everyone said, “The AI memory bubble has burst.” Just today, a big green candle surged from $700 to $775, up 7%, with trading volume soaring to $1 billion, while Goldman Sachs still has a $1,250 price target. Is this just a dead-cat bounce, or the second wave of a supercycle?

First, the surface: down 40%, but today it staged a violent rebound.

It fell more than 20% in the past 30 days, tumbling from a high of $1,255 to around $700, trapping who knows how many people. But just now, it rallied from $700.93 to $778 in 24 hours, wi

$ARIA You’re not selling? I’m not selling? Let the market makers sell? Why aren’t you rushing to lock in profits?

Great $HANA is moving up again, with steady upward momentum and little risk of a liquidation sweep, so I’m also comfortable confidently going long😍😍😍$AGT $ERA 😍😍😍

They doubted me
Now I will have the last laugh

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Sectors/indexes yesterday and MTD/YTD

#USAICStocksFallBroadly
US AI STOCKS FALL BROADLY: TECHNOLOGY SELLOFF RAISES QUESTIONS ABOUT AI VALUATIONS AND MARKET CONFIDENCE
The artificial intelligence sector is facing renewed selling pressure as major US AI-related stocks move lower. The broader decline is putting technology investors on alert and raising questions about whether the market's powerful AI rally is entering a period of correction.
AI companies have attracted enormous investor interest because of their potential to transform industries, improve productivity, and generate new business opportunities. However, expectations ha

#BTC / #EUR
$BTC is reaching a very strong support at range low against Eur. 📉
I expect a bounce over the coming days. 🚀
#Bitcoin #Crypto #CryptoNews