Automatic investing: DCA, robo-advisors & bots
Automation removes emotion, the single biggest destroyer of returns. But "automatic" spans three very different things, each automating a different part of the job, and each hiding its cost somewhere different. Here's what you're actually delegating.
Dollar-cost averaging (DCA)
Invest a fixed amount on a fixed schedule, regardless of price. It doesn't beat the market, lump-sum investing usually wins on average because markets rise over time. What DCA buys you is behavioural: it removes the temptation to time entries, and it smooths your average price through volatility. For most people, a boring automated DCA into a broad index fund quietly outperforms their own clever timing.
Robo-advisors
Software that builds and rebalances a diversified portfolio for you based on a risk questionnaire. What it automates: allocation, rebalancing, often tax-loss harvesting.
- Good for: hands-off investors who want a sensible, diversified portfolio without picking funds.
- The cost: a management fee (often ~0.25%/yr) on top of the underlying fund fees. Small-sounding, meaningful over decades.
- The limit: it can't know your full financial life the way a human planner can. It's asset allocation, not advice.
Trading bots
Programs that execute a strategy, DCA bots, grid bots, or signal-following bots, automatically on an exchange. This is where the gap between "sounds passive" and "is passive" is widest.
- DCA / grid bots automate discipline in a range-bound market and get run over in a strong trend.
- Signal bots are only as good as the signal. A feed like Peaky Radar surfaces candidates; wiring it to auto-execute removes your judgement from the loop, the opposite of what "radar, not guru" is for.
How to automate without switching off your brain
Automate the boring, high-value part first: a scheduled DCA into low-cost, diversified holdings. Layer complexity only once you understand the strategy underneath it. And keep a human check on anything that trades with leverage or reacts to signals, automation should remove emotion, not accountability.
Educational market information, not financial advice. Some links on this site are affiliate links, always disclosed. Automated systems can fail or lose money; markets carry risk of loss, do your own research and consider a licensed advisor.