Understanding forex grid trading

I think the best way to understand forex grid trading is to do it yourself. This is how I learned.
Let me try to put it simple on a single pair EURUSD with 20 pips grid spacing:

1. In one account, put limit buy orders every 20 pips at …, 1.2200, 1.2220, 1.2240, 1.2260, 1.2280, 1.2300, 1.2320, 1.2340, 1.2360, 1.2380, ….
Each order has a TP of 20pips (maybe 17pips if you don’t want to have a trade while the immediate lower one doesn’t TP), and NO STOPs.
Whenever a buy order is gone (either because it TP or limit order expires), re-enter that limit order (at the same price and same TP, no stop)

2. In another account, do the same thing except do sell instead of buy.

I personally trade in one account only and have adapative spacing, and use market orders instead of limit orders. But if you try this for 2 or 3 days, you will get the idea.