Arbitrage and grids don't predict — they harvest recurring patterns.
What you will learn
Understand arbitrage and its limits
Explain grid and DCA bots
Recognize when mechanical strategies break
Systematic rebalancing
Systematic rebalancing
Dollar-cost averaging
Dollar-cost averaging
Arbitrage: the free lunch (that's never free)
Arbitrage buys an asset where it's cheap and sells where it's expensive, capturing the difference. Classic forms: cross-exchange (same coin, different prices), triangular (three-pair imbalances), and funding-rate arbitrage. It's 'riskless' in theory — until latency, fees, or a move erases it.
💡 Why arb is competitive
A price gap of 0.5% between two exchanges looks free — but by the time you route, pay fees, and move funds, the gap closes. Professional arbers fight over milliseconds and tiny edges. For retail, 'arbitrage' usually hides an undiscovered cost or risk.
Grid trading
A grid bot places buy orders at intervals below the price and sell orders above, harvesting the oscillation. It profits in range-bound markets and bleeds in trends (a trending market runs through the grid). It's a bet on chop, not direction.
Dollar-cost averaging (DCA)
DCA invests a fixed amount on a schedule regardless of price — buying more when cheap, less when expensive. It removes timing from the equation and is the most robust 'strategy' for long-term accumulators. It doesn't maximize returns; it maximizes discipline.
💡 DCA vs. timing
Try to time the bottom and you might wait forever, then buy high in a panic. DCA the same capital weekly and you'll get a fair average price and stay invested through the fear. For most long-term savers, DCA is the rational default.
When mechanical strategies break
Arbitrage breaks when the inefficiency closes. Grids break in strong trends. DCA 'fails' only if the asset trends to zero permanently. Know the market condition each strategy assumes — and switch off when that condition changes.
❓ Quick check
Grid trading profits best in which market?
A) Strong trend
B) Range-bound/choppy
C) Crash
D) Gap
Grids harvest oscillation.
(Knowledge check — full exam is next)
Key takeaways
Arbitrage = capturing price gaps; competitive and rarely free for retail
Grids bet on chop; DCA bets on long-term accumulation
Know each strategy's assumed market condition
📝 Weekly Exam — pass with 80% to unlock next week
10 questions. Review the Deep Dive and courses before attempting.
1. Arbitrage is:
Capturing price differences.
2. For retail traders, 'arbitrage' usually hides:
Costs/latency erase it.
3. Grid trading profits in:
Oscillation harvest.
4. A grid bot bleeds in:
Trends run through the grid.
5. DCA means:
Fixed schedule.
6. DCA's main advantage is:
Discipline over timing.
7. Arbitrage is competitive because:
Professionals race for tiny edges.
8. A strategy's 'assumed market condition' is:
Match strategy to regime.
9. The most robust long-term accumulation strategy is:
DCA = disciplined accumulation.
10. When the market condition changes, you should:
Adapt or switch off.
Your score: —
🛠 Weekly Project
Simulate a DCA plan.
1
Pick an asset and a monthly amount to DCA over 6 months.
2
Use 6 real historical monthly closes.
3
Compute your average cost per unit and compare to the current price.
4
Write one sentence on how DCA's average compared to buying all at once at the high.