If your price range is 1.2-1.4 and current price is 1.25 , then it will means the bot needs to put buy order between 1.2.-1.25 and sell order between 1.25-.1.4. Buy order need USDT, and sell order need ADA. Since you start with USDT, there’s no problem with the buy order. But for the sell order, the bot will need to buy certain amount of ADA to put on sell order between 1.25-1.4. The bot will buy this token at CURRENT PRICE, not in 1.25-1.4 price, so you’ll have a better entry for the tokens that will put in sell order at higher place.
You will notice later after those sell order is filled that their grid profit is way bigger than the normal grid profit because of those tokens is bought from the beginning of bot, which has lower entry than the grid should be later after that sell order filled.