Please explain the symbols of a hollow candle chart (i.e., hollow green vs green, hollow red vs red). I have a general understanding of a regular candle chart, but I'm unclear about the hollow candles on a hollow candle chart. Thanks!

The deep research logic is organized as follows: 

Okay, let's tackle this question about hollow candle charts. The user is asking for an explanation of the symbols, specifically hollow green vs green and hollow red vs red. They already know regular candle charts but are confused about the hollow ones. 

First, I need to gather the information from the references provided. Let's go through each reference to find relevant details. 

Starting with Reference 1, it explains that hollow candles have a different fill based on the current close vs open. Hollow means close > open, filled means close < open. The color is determined by comparing the current close to the previous close. So, green if current close > previous close, red otherwise. That's a key point. 

Reference 2 from Highcharts confirms this. It mentions that the fill depends on current close vs open, and color on current close vs previous close. So, hollow green would mean close > open and close > previous close. Similarly, hollow red would be close > open but close < previous close. 

Reference 3 is a Reddit post where someone is confused about the same thing. They mention that most positive candles are hollow black, which aligns with the previous info. The user there is asking for the difference beyond OHLC bars, which is exactly what the user is asking now. 

Reference 4 from LuxAlgo breaks it down into four types: green hollow (strong bullish), red hollow (moderate bullish), green filled (moderate bearish), red filled (strong bearish). This adds context on the strength of the signals. 

Reference 5 is another Highcharts article, reiterating the fill and color rules. 

Reference 6 from TradingView explains the four types clearly: green hollow (bullish momentum), green filled (mixed), red hollow (mixed), red filled (bearish). It also mentions the benefits of hollow candles over standard ones, like easier trend changes and accumulation/distribution phases. 

Reference 7 is about bullish patterns, but it mentions hollow candles as bullish. However, it doesn't add much to the current question. 

References 8 and 9 are Reddit posts asking about the difference between hollow and solid, which is exactly what the user is asking. They mention that sometimes small candles have different fills without a clear reason, but the main takeaway is the fill and color rules. 

Reference 10 from Zerodha support explains the color and fill rules clearly: color based on previous close, fill based on current close vs open. 

Reference 11 is about candlestick colors in general, not specific to hollow charts, but it's useful to note that hollow vs filled adds another layer of information. 

Reference 12 from MultiCharts explains how to interpret hollow candles, confirming the same rules. 

Reference 13 is a blog post explaining the advantages of hollow candles over traditional ones, emphasizing the combination of color and fill. 

Reference 14 is another Reddit post asking why there are both red and green hollow candles, which ties back to the color being based on previous close. 

Putting this all together, the user needs a clear explanation of how hollow green vs green and hollow red vs red differ. The key points are:

1. Fill (hollow vs filled) indicates current close vs open.
2. Color (green vs red) indicates current close vs previous close.
3. This creates four combinations: hollow green, filled green, hollow red, filled red, each with different implications.

I should structure the answer with a conclusion first, then a detailed analysis using tables and examples. Make sure to cite the references properly. Also, include the visualization as per the query. The user is interested in tech stocks, so maybe mention how this applies to AAPL or NVDA, but the question is general, so perhaps keep it broad unless the user's profile suggests otherwise. 

Wait, the user's profile mentions they're interested in tech stocks like AAPL, GOOG, etc., and use technical analysis. So maybe include an example with AAPL to make it relevant. But the question is about the symbols themselves, not specific stocks. Still, the example could help. 

Also, the user prefers real-time data and personal notes, but that's more about their tools, not the current question. Focus on explaining the hollow candle symbols. 

I need to ensure the answer starts with a definitive conclusion, then detailed analysis with tables, and include the visualization as per the query. The visualization should be inserted after the relevant paragraph. 

Let me outline the structure:

1. Conclusion: Summarize the key differences between hollow green, green, hollow red, and red candles.
2. Detailed Analysis:
 - Fill vs Color rules
 - Four types of candles with examples
 - Advantages and limitations
3. Visualization: Insert the Query after the relevant section.

Make sure to use the correct citations from the references. For example, the fill rules are from References 1, 2, 4, 5, 6, 10, 12, 13. The color rules are from the same. The four types are from References 4, 6, 10, 12, 13. 

Also, check if any references mention the same points to avoid redundancy. For example, References 1 and 2 both explain the fill and color rules. 

I should also address the user's confusion from Reference 3, where they noticed most positive candles are hollow black. That's because when the current close is higher than the open (hollow) and higher than the previous close (green), but in some platforms, green might be represented as hollow black. Wait, no, in Reference 3, the user mentions hollow black and filled black. That might be a platform-specific display, but the general rule is color based on previous close. So, in the answer, clarify that color is based on previous close, regardless of the fill. 

Also, mention the subjectivity and confusion mentioned in References 1 and 4, as limitations. 

Finally, ensure the answer is engaging with emojis and uses markdown tables as per the format requirements. The visualization should be inserted after the paragraph where the query is cited. 

Let me draft the answer step by step, making sure each point is covered with the correct citations and structure.

### 🌟 **Conclusion** 🌟
Hollow candle charts combine **fill (hollow/filled)** and **color (green/red)** to convey nuanced price action insights. A **hollow green candle** signals **bullish momentum** (close > open & close > previous close), while a **filled green candle** indicates **mixed bullish strength** (close < open but close > previous close). Similarly, a **hollow red candle** suggests **moderate bearishness** (close > open but close < previous close), and a **filled red candle** reflects **strong bearish pressure** (close < open & close < previous close). This dual-layered analysis helps traders identify trends and reversals more effectively .

---

### 📊 **Detailed Analysis** 📊

#### 1. **Key Rules of Hollow Candle Charts**
| Attribute | Definition | Example |
|------------------|---------------------------------------------------------------------------|------------------------------------------------------------------------------|
| **Fill** | - **Hollow**: Close > Open (bullish) - **Filled**: Close < Open (bearish) | - Hollow: Price rose during the period (e.g., AAPL’s bullish day). - Filled: Price fell during the period. |
| **Color** | - **Green**: Close > Previous Close (upward momentum) - **Red**: Close < Previous Close (downward momentum) | - Green: Price closed higher than the previous day. - Red: Price closed lower than the previous day. |

#### 2. **Four Types of Hollow Candles**
| Candle Type | Fill & Color Combination | Market Signal |
|-------------------|---------------------------|-------------------------------------------------------------------------------|
| **Hollow Green** | Hollow (Close > Open) + Green (Close > Previous Close) | **Strong Bullish**: Price rose intraday and closed higher than the previous day. |
| **Filled Green** | Filled (Close < Open) + Green (Close > Previous Close) | **Mixed Bullish**: Price dipped intraday but still closed higher than the previous day. |
| **Hollow Red** | Hollow (Close > Open) + Red (Close < Previous Close) | **Moderate Bearish**: Price rose intraday but closed lower than the previous day. |
| **Filled Red** | Filled (Close < Open) + Red (Close < Previous Close) | **Strong Bearish**: Price fell intraday and closed lower than the previous day. |

#### 3. **Practical Implications**
- **Hollow Green**: Ideal for identifying **bullish reversals** or **continuation** (e.g., AAPL breaking out after consolidation).
- **Filled Green**: Suggests **intraday weakness** despite an overall bullish trend.
- **Hollow Red**: Indicates **resistance** or **short-term pullbacks** in a bearish trend.
- **Filled Red**: Confirms **bearish dominance** with no intraday recovery.

#### 4. **Advantages & Limitations**
| Aspect | Hollow Candles | Regular Candles |
|-------------------|--------------------------------------------------------------------------------|--------------------------------------------------------------------------------|
| **Pros** | - Combines fill and color for clearer trend signals. - Highlights intraday vs. interday price dynamics. | - Simpler to interpret but less detailed. |
| **Cons** | - Subjective interpretation (e.g., mixed signals in hollow red/filled green). - Less widely used than regular candles. | - No fill distinction; only color-based signals. |

---

### 📊 **Visualization** 📊
Query
|code|stock code|stock name|Last Price|Last Change|Theme|Inclusion Reason|market_code|
|---|---|---|---|---|---|---|---|
|BTOG|BTOG.O|Bit Origin|0.4447|8.463415000000001|||186|
|WULF|WULF.O|TeraWulf|9.28|5.694761000000001|||186|
|BTCS|BTCS.O|BTCS|4.46|5.437352|||186|
|RIOT|RIOT.O|Riot Platforms|12.52|4.6822740000000005|||186|
|BTCM|BTCM.N|BIT Mining|2.94|2.439024|||169|
|MSTR|MSTR.O|Strategy|344.37|2.317497|||185|
|CRCL|CRCL.N|Circle|137.81|1.907861|||169|
|MARA|MARA.O|MARA Holdings|15.45|1.845748|||186|
|HUT|HUT.O|Hut 8|22.31|1.501365|||185|
|BTBT|BTBT.O|Bit Digital|2.76|1.470588|||186|

---

### 🌟 **Final Thoughts** 🌟
Hollow candle charts offer a **deeper layer of analysis** by combining intraday price action (fill) with interday momentum (color). For tech stocks like **AAPL** or **NVDA**, this can help spot **breakouts** or **pullbacks** more effectively. However, always pair hollow candles with other tools (e.g., volume, RSI) for robust confirmation . Happy charting! 🚀