A bot with a SHORT algorithm sells with the first coin of the trading pair, receiving payment with the second coin of the trading pair. Therefore, for a bot with the SHORT algorithm, the deposit (virtual wallet) must be in the first coin of the trading pair.
Consider the BTC-USDT trading pair. Here, the first coin of the trading pair is BTC, the second coin of the trading pair is USDT. The bot will first sell its BTC for USDT when the BTC price increases, after which it will buy back all the BTC sold for USDT if the BTC price falls. That is, in order for the bot to start trading (selling BTC), it needs to have this BTC available from the start, and this is the first coin in the trading pair. Therefore, in order to create a bot with the SHORT algorithm in the BTC-USDT trading pair, it is necessary for the bot to have a deposit (virtual wallet) in the BTC.
