There can be various reasons why your trading strategy isn't placing orders:
Limited opportunities. The trading strategy you're using doesn't frequently trigger a buy or sell. Check how often your strategy provides buy and sell signals using the strategy backtester.
Too many technical indicators. You've selected too many technical indicators that need to give a buy or sell signal simultaneously before a buy or sell order is placed. Consider selecting fewer technical indicators that need to give a buy or sell signal before a buy or sell order is placed on your crypto exchange.
Not enough cryptocurrencies. You've selected too few cryptocurrencies that your trading bot is allowed to buy. Check this in "Currencies and amounts" in the Base config.
Output information. In the trading bot output on the Dashboard or Advanced Dashboard, there may be trading bot errors that prevent the placement of orders. Review the errors and adjust settings as needed in the Base config.
Number of targets to buy. When you have set the numbers of targets to buy and the bot is finding more opportunities the bot won't place all the buy orders. For example, you set this to 1 and the bot is finding 3 targets it will only place an order for 1. The 1 that is best is sorted by the number of indicators and buy signals it hit. Important: there's no message about this in the output.