Recently, Ethereum (ETH) has stirred waves in the cryptocurrency market, with its price strongly challenging the 4500 USDT mark, and the technical aspects are releasing multiple signals. Combining the 4-hour and 1-hour candlestick charts, we analyze the underlying logic of ETH's 'assault' from dimensions such as Bollinger Bands (BOLL) and changes in volume:

1. Bollinger Bands opening up, bullish momentum 'explosive' outbreak

On the 4-hour chart:

- ETH price continues to rise along the Bollinger Band middle track (MID:4274), breaking through the upper track (UP:4435) and reaching a maximum of 4518, directly igniting the 'assault' on the 4500 mark.

- The opening of the Bollinger Bands is widening, suggesting the start of a trending market — when the price breaks the upper track, it usually accelerates the trend, but be cautious of pullbacks after 'false breakthroughs' (if the pullback is small and support is strong, the validity of the breakthrough is higher).

Switch to the 1-hour period:

- The upper track of the Bollinger Bands (UP:4508) has become an immediate resistance level, with the current price (4488) just a step away from the upper track.

- The intraday trend shows a rhythm of 'rising → pullback → re-attacking': during the pullback process, it did not break below the middle track (4342), indicating that short-term support is solid and bullish support is strong (if it breaks below the middle track, be wary of pullback risks).

2. Volume + Capital: Is the 'ammunition' for the attack sufficient?

Behind the market, capital flow and trading volume are the core anchor points for judging sustainability:

- Capital situation: ETH's net inflow during the day reached 117 million USD, with significant inflow supporting bullish confidence.

- Trading volume: Daily trading volume surpassed 3.4 billion USD, with a pattern of rising price + increasing volume, indicating high market participation enthusiasm and that the short-term upward logic has not been broken.

But it should be noted:

The candlestick shows a combination of 'large bullish candle + long upper shadow' — reflecting the bullish attack intention while exposing the selling pressure in the 4500~4518 range (previously trapped positions, short-term profit-taking occurring simultaneously, forming a resistance area).

3. 4500 mark: Breakthrough or pullback? Keep an eye on these two signals!

To confirm that ETH stands firm at 4500, the following two major signals must be observed:

Signal 1: Is the volume 'sustainable'?

- If subsequent rises are accompanied by increased trading volume and break through the previous high of 4518, then pullbacks that do not drop below 4500 confirm an 'effective breakthrough', with bulls expected to open new space.

- If volume shrinks and price stagnates, be wary of 'false breakthroughs', as the risk of a pullback increases sharply.

Signal 2: Is the Bollinger Band structure 'strong'?

- 4-hour level: If it can maintain operation above the upper track (or quickly recover the upper track after a pullback), it indicates that the trend has not changed and the bulls still hold the advantage.

- If it falls below the middle track (4274), be wary of a pullback (strong support at the 4350~4400 range, which can serve as a dip-buying observation point).

The volatility of cryptocurrencies is essentially a 'battlefield' of long and short — the 4500 mark is both a 'medal' for the bulls and a 'fortress' for the bears.

The current technical outlook is bullish but with doubts:

- Bullish advantage: Upward trend, volume support, effective support.

- Potential risks: Strong resistance at 4500, market sentiment is vulnerable to BTC's influence (if BTC drops sharply, ETH may follow with a pullback).

For traders, the advice is:

- Aggressive investors: Pay attention to the 'breakthrough pullback to 4500' dip-buying opportunity (must confirm support strength).

- Cautious investors: Wait for a clear signal of 'stabilizing above 4518 + volume continuing to rise' before entering the market again.

After all, in the cryptocurrency market, 'certainty' is always more important than 'greed'.