Boom & Crash Explained: How the Spikes Actually Work (2026)

Illustration of a candlestick chart grinding one way then spiking sharply the other

Key takeaways

Boom spikes UP and grinds down; Crash spikes DOWN and grinds up
Spikes are random and memoryless — no pattern or bot can predict them
Beginners lose by fighting the spike direction or chasing it after it prints
React to price with defined risk; never pre-position for a spike
Lower-frequency indices (500) are calmer for beginners; 1% risk rule always applies

What Boom and Crash actually are

Boom and Crash are synthetic indices on Deriv with a personality. A Boom index drifts slowly down in small candles, then fires a sudden up-spike. A Crash index does the reverse — grinds up, then spikes down. The number in the name is the average tick gap between spikes: Boom 500 spikes roughly every 500 ticks, Boom 300 more often, Boom 1000 less often.

Boom 500: price grinds slowly down, then spikes up without warning. The spike is random and memoryless — no chart pattern predicts it.

The one thing you must understand: the spike is random

The spikes come from a cryptographically secure, independently audited random-number engine. It is memoryless — the chance of a spike on the next tick is the same whether the last spike was 10 ticks ago or 900. That kills the single most expensive belief in Boom/Crash trading: "a spike is overdue." It never is. No indicator, no bot, no pattern predicts the next spike, because there is nothing to predict.

Why beginners lose on them

They fight the spike direction. Boom grinds down, so beginners short it — collecting small wins until one up-spike erases weeks of profit in seconds.
They chase the spike after it prints. By the time you see the spike, the move is over; entering late is buying the top.
They use no stop, or a stop inside the noise. These indices routinely wick far past obvious levels; a tight stop gets clipped constantly.

The disciplined approach

You cannot predict the spike, so don't try. Instead:

React, don't predict. Wait for price to actually do something — a real break of structure or a clean setup — then act. No pre-positioning "for the spike".
Trade defined-risk products. On Deriv Trader, multipliers and options cap your loss at your stake, shown upfront — ideal while you're learning these markets.
Size for 1% risk, stop beyond the noise. Put your stop outside the normal wick range and shrink your lot size so the dollar risk is still 1%. Our position-size calculator does this for Boom and Crash specifically.
Respect the grind side. Shorting a Boom or longing a Crash is fighting the built-in spike — the odds are structurally against you.

The honest bottom line

Boom and Crash are exciting and they move fast, which is exactly why they're dangerous for beginners. There is no strategy that always wins — around 70% of traders lose. The people who survive treat these like any other market: a plan, defined risk, small size, and a lot of screen time on the free demo first. Learn the mechanics on demo before a single real dollar. Start with our free course.

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Frequently asked questions

How do Boom and Crash indices work?

Boom indices grind slowly downward and spike upward at random intervals (Boom 500 spikes on average every 500 ticks). Crash indices do the opposite — grind up, spike down. The spikes are produced by a memoryless random-number engine, so they can't be predicted from the chart, only reacted to.

Why do beginners lose on Boom and Crash?

Two classic mistakes: fighting the spike direction (shorting Boom during its downward grind, then getting hit by the up-spike), and chasing a spike after it has already printed. Because the spike is random, no "a spike is overdue" logic works — that thinking is exactly what drains accounts.

What is the best Boom or Crash index for beginners?

Lower-frequency indices like Boom/Crash 500 give calmer, less frequent spikes than the 300 or 150 versions, so beginners have more time to think. Whichever you choose, tiny position sizes and the 1% risk rule matter far more than the specific index.

Can you predict Boom and Crash spikes?

No. The engine is memoryless — each tick is statistically independent of the last, and the spike timing is genuinely random. Anyone selling a "spike predictor" bot or indicator is selling you something that cannot work. You react to price with defined risk; you never predict.

Is there a strategy that always wins on Boom and Crash?

No — around 70% of retail traders lose money, and no strategy guarantees profit on a random market. What works is process: wait for a real setup, size for 1% risk, place your stop beyond the noise, and take defined-risk trades. Practise it on the free demo before risking a cent.

Written by Tony — AA Global FX
Tony runs a live trading desk on Deriv synthetic indices and index CFDs and has published 116+ free trading tutorials on YouTube since 2022. About · YouTube
Last updated: 2026-07-14

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