How to Read RSI on Binance: Are the 70/30 Levels Really Effective?
RSI is the most common overbought/oversold indicator. This article uses BTC examples to explain its effective and ineffective scenarios.
RSI is the most fundamental indicator for beginners. First, log in to the Binance Official Website. For mobile users, use the Binance Official App (see the iOS Installation Tutorial for iPhone users).
The Logic Behind RSI
RSI stands for Relative Strength Index.
Simplified Formula: RSI = 100 - 100/(1+RS), where RS is the average ratio of gains to losses.
The value ranges from 0 to 100:
- > 70: Overbought
- < 30: Oversold
- 50: Neutral
How to Add RSI on Binance
Go to the K-line chart → Indicators → Search for "RSI" → Add.
A line ranging from 0 to 100 will appear in the sub-chart area, accompanied by two horizontal reference lines at 70 and 30.
RSI Signals
1. Overbought/Oversold Reversal
- RSI > 70: Overbought; a pullback may occur.
- RSI < 30: Oversold; a rebound may occur.
While straightforward, using this signal in isolation often fails.
2. Crossing the 50 Line
- Above 50: Overall market strength.
- Below 50: Overall market weakness.
- Crossing Above 50: Bullish shift.
- Breaking Below 50: Bearish shift.
3. Divergence
- Bearish Divergence: Price makes a new high + RSI fails to do so → Beware of a potential correction.
- Bullish Divergence: Price makes a new low + RSI fails to do so → Beware of a potential rebound.
Divergence is much more reliable than simple overbought/oversold levels.
Scenarios Where RSI Fails
1. Strong Trends
In a strong one-sided trend, RSI can remain > 70 or < 30 for an extended period.
Example: During the 2021 BTC bull run, the RSI stayed above 70 for weeks while the price continued to climb.
Strategy: Do not use RSI in trending markets; rely on trendlines instead.
2. Conflicts Across Timeframes
The 1m RSI might show oversold, while the 1d RSI shows overbought. Which one is right?
Strategy: Prioritize your primary trading timeframe, but never ignore the macro trend.
3. Altcoins
Altcoins are highly volatile, and their RSI frequently touches 70/30. You cannot trade them mechanically based on these levels alone.
Choosing a Period
- Default 14 periods: Standard for most traders.
- Short-term 7-9 periods: More sensitive but includes more noise.
- Long-term 21-30 periods: More stable but reacts slowly.
Beginners should stick with the default 14-period setting.
Combining RSI with Other Indicators
RSI + MACD
- RSI > 70 + MACD Death Cross: Strong Sell.
- RSI < 30 + MACD Golden Cross: Strong Buy.
Confirmation between two independent indicators significantly improves the win rate.
RSI + Trendlines
- Oversold RSI in an uptrend: Buy.
- Overbought RSI in a downtrend: Sell.
- Never trade against the trend.
RSI + Volume
- Overbought RSI + Declining Volume: Reliable signal for a reversal.
- Overbought RSI + Increasing Volume: The trend is likely to continue.
Practical Example
If BTC is in a sideways range around $60,000:
- Price drops and RSI hits 25 → Enter Buy.
- Price rises and RSI hits 75 → Sell.
- Repeat the process.
In a ranging market, RSI is a gold mine. In a trending market, RSI is a trap.
Trading Both Sides
Longing
- Wait for RSI to drop below 30 → Wait for it to start curling up → Buy.
- Stop Loss: RSI drops further.
- Take Profit: RSI reaches 70 or 50.
Shorting
- Wait for RSI to rise above 70 → Wait for it to start curling down → Sell / Short.
- Stop Loss: RSI rises further.
- Take Profit: RSI reaches 30 or 50.
Common Mistakes for Beginners
1. Selling as soon as it hits 70
In a strong trend, 70 is just the beginning.
2. Buying as soon as it hits 30
In a grinding downtrend, 30 can easily become 20 or even 10.
3. Ignoring Timeframes
An RSI of 70 on a 1m chart has a completely different meaning than 70 on a 1d chart.
4. Single-Indicator Decisions
RSI must always be combined with trend and volume analysis.
RSI Effectiveness by Coin Type
| Coin Category | 70/30 Suitability |
|---|---|
| BTC | High |
| ETH | High |
| Major Altcoins | Medium |
| Meme Coins | Low (Frequently exceeds boundaries) |
| Micro-caps | Very Low |
RSI 70/30 is most effective for mainstream coins. For Meme coins, it is almost meaningless.
FAQ
Q: Which is better, RSI or KDJ? A: They share similar principles. RSI is simpler, while KDJ has more noise. Beginners should use RSI.
Q: Should I change the 14-period setting? A: 14 is the industry standard. Use 9 for short-term and 21 for long-term.
Q: What is the best RSI value to buy? A: Only consider buying when it is below 30, but confirm with other indicators.
Q: Does RSI always stay between 30 and 70? A: Not necessarily. In extreme market conditions, it can go above 90 or below 10.
Q: Is RSI suitable for automated trading bots? A: Using RSI alone for bots usually yields low win rates. It needs to be part of a broader logic.
Further Reading
RSI is the first indicator every beginner should learn. Understanding that 70/30 levels are reference points rather than mechanical buy/sell signals will help you avoid most common pitfalls.