diff --git a/src/Investing-and-trading.md b/src/Investing-and-trading.md
index 4082fed..af5290d 100644
--- a/src/Investing-and-trading.md
+++ b/src/Investing-and-trading.md
@@ -2,19 +2,21 @@
 
 Stocks, cryptocurrencies, etc.
 
-Here are several methods of accounting for investments and trading in PTA:
+The main challenge of accounting for investments and trading in PTA is tracking lots and disposing (selling) them in the right order.
+Here are several methods:
 
-1. Lot subaccounts (works in all double-entry accounting software). 
+1. **Lot subaccounts** (works in all double-entry accounting software). 
    Each lot is given an explicit subaccount, entries are created manually.
    Flexible.
    - https://forum.plaintextaccounting.org/t/repost-example-calculating-uk-capital-gains-with-ledger/227/2
 
-2. Lot syntax (Beancount & Ledger).
-   Entries use special lot syntax.
+2. **Lot syntax** (Beancount & Ledger).
+   The app has special syntax and support for lots.
    - Beancount: https://docs.google.com/document/d/1F8IJ_7fMHZ75XFPocMokLxVZczAhrBRBVN9uMhQFCZ4/edit#heading=h.katmw1lwm4yh
    - Ledger: https://ledger-cli.org/doc/ledger3.html#Buying-and-Selling-Stock
 
-3. Entry-generating tools.
+3. **Lot entry-generating tools**.
+   Add-on tools help generate lot-aware entries.
    - [lotter](https://src.d10.dev/lotter/doc/tip/README.md) detects lots from ordinary transactions, adds lot information to buy/sell entries. Runs ledger.
    - [hledger-lots](https://github.com/edkedk99/hledger-lots) detects lots from ordinary transactions, helps make buy/sell entries. Runs hledger.
    - [hledger-move](https://hledger.org/scripts.html#hledger-move) is a lower-level tool to help make trading (sell) entries. Works with hledger journals.