About Dingtouma, and the Person Who Writes It

Who writes this

My name is Gu He. I'm not an analyst or a trading coach. Dingtouma is a set of notes I write on position sizing and risk. The question here isn't “which coin”; it's how much to put in, how to split it, and how not to do something rash when the price drops.

Investing too much from the start, adding at the most excited moment, and panic-selling on the way down: none of these three has to do with reading the market correctly. They are about keeping yourself in check, and that is the ground Dingtouma covers.

Why I made this site

For someone new to crypto, “how do I avoid losing everything” matters more than “which coin do I buy”: as long as you're still in the game there is a next chance, and once the principal is gone there is nothing left to talk about.

So this site covers only three things: how much to invest, how to allocate it, and how to get through a downturn. Each comes with its calculation spelled out and with three small tools you can run the numbers in directly; three further pages cover setting up Binance Convert Recurring, its execution rules, and account security.

What this site will and won't do

Won't recommend which coin to buy, won't call trades, won't predict prices. I can't do those, and neither can anyone.
Won't promise any returns. Every calculator here is there to show you how big the risk is, not how much you'll make.
Will explain the method clearly, cite where the data comes from, and call the uncertain parts uncertain.

How the three tools calculate, and where the numbers come from

Position sizer: cap = investable money × the share of it you can accept losing ÷ the worst fall you assume. Example: $100,000 × 5% ÷ 70% ≈ $7,143, or 7.1% of the total. A result above 10% of your investable money is capped at 10%, and the tool shows the capped figure alongside the calculated one. “Start at 1%–3%, with 10% as the ceiling” is this site's rule of thumb and does not come from research.
DCA calculator: total invested = amount per buy × number of buys; the number of buys is converted from the plan length in months (daily ≈ 30.44/month, weekly ≈ 4.33/month, every two weeks ≈ 2.17/month, monthly = 1). Maximum paper loss = total invested × the fall you assume, which is an upper bound. It fetches no prices and works out no returns; the way to calculate a return is in how to calculate your DCA return.
Risk exposure quiz: five questions scored 0–3 each, for a total of 0–15: 0–4 leans steady, 5–9 is balanced, 10–15 leans aggressive. The result is calculated in your browser only.
Price figures: bitcoin prices in the articles are BTCUSDT monthly closes (UTC) from Binance's public market data API. The DCA worked examples buy at the month-end close and are valued at a monthly candle that has fully closed. Where a daily high or low is used, the text says so at that point.
Binance rules: quoted from Binance's Help Center, with each page's publication or update date given: Frequently Asked Questions on Binance Convert “Recurring” (updated May 2026), Migration: Auto-Invest to Convert Recurring (published February 2025) and How to Complete Identity Verification for a Personal Account (updated June 2026). If the official page has changed, the official page is what counts.

How this site pays for itself

This site takes part in Binance's referral program. If you register with Binance through this site's link or referral code, the site may receive a referral fee from Binance, and you pay nothing extra for it. The code gives up to 20% off trading fees; what that covers and which regions it doesn't reach are set out in the disclosure. This is the site's only source of income.

The only referral code this site carries is Binance's.

Where the content comes from, and what happens when it's wrong

The content here is a write-up of common position-sizing and risk practices, plus publicly verifiable data (prices, historical drawdowns and the like are all sourced); wherever a platform's features or rules come up, the platform's official pages take precedence. I'm not an expert and mistakes are inevitable. If you spot something wrong, tell me; I'll fix it and note what changed in the corrections log.

For questions or corrections, email: [email protected].

Last updated: October 2026