Indicators summarise rather than predict. Knowing what they summarise prevents misreading.
Most indicators placed on a chart take prices that already happened and run them through a formula. They add no new information; they organise what has occurred into something easier to read. Saying an indicator gives a signal is therefore imprecise. It shows, in one number, what recent movement has been like.
Some indicators express the balance of recent rises and falls as a value between zero and one hundred. A high value means it rose a lot recently and a low value means it fell a lot. These are commonly called overbought and oversold, and those names invite the misreading that a reversal is due. In a strong trend, the value can stay high for a long time.
Dominance expresses one asset's share of the whole market. A rise can mean that asset went up, or that everything else fell further. Ratio indicators move through both numerator and denominator, so deciding the cause from one number alone is error-prone.
Indicators expressing fear and greed as a number combine several inputs such as volatility, volume and search interest. What is mixed in, and at what weight, differs by whoever builds it. The same-named indicator therefore carries different values from different sources, and reading changes within one source misleads less than reading the absolute number.
Load enough indicators and at any moment something says buy and something says sell. You then end up selecting whichever agrees with you, which does not aid judgement so much as support a decision already made. Knowing what an indicator computes matters more than how many you use.
Besides spot prices, the crypto market leans heavily on indicators from futures markets. The funding rate is a periodic payment between longs and shorts that keeps perpetual futures prices close to spot; a large positive figure is read as longs being crowded. Open interest (OI) is the total of contracts not yet closed, showing how much borrowed money has built up in the market. The long/short ratio is the share of accounts or positions compiled by an exchange. These indicators show how lopsided positioning is, but not direction, and lopsidedness can last longer than expected. Remember also that each exchange compiles them differently.
The same indicator can paint a completely different picture depending on the period used. It's common for something to be overbought on hourly candles yet neutral on daily ones. With moving averages too, the price may be above or below depending on whether you look at the 20, 60 or 200-day line. So an indicator value only means something when stated with its timeframe and period setting. That's why tools that show several timeframes at once exist. Knowing that short-period indicators flip often and long-period ones react slowly reduces confusion.
To actually use indicators, it helps to set a few principles. First, cut down to two or three indicators and make sure you can explain what each one calculates. Next, fix the timeframe and period settings so you don't tweak them to manufacture the answer you want. Then, when reading a value, also look at what situations that value appeared in historically. Past statistics are a useful reference, but results change with the sample and period, and the same conditions recurring don't guarantee the same outcome. Indicators are tools for summarising state; this guide recommends no trades.
Check it live