Hmmm from my understanding, terms of trade (ToT) is simply the ratio of a country's export prices to it's import prices. So therefore, a ratio above 1 would suggest that the country in analysis receives more for its exports than it has to spend on its imports. This results in a positive net export balance (X-M) in terms of price.
Increased ToT is favourable to a country's economy as it increases the (X-M) components of the AD equation which in turn increases AD and economic growth. Also don't be confused with the law of demand in relation to ToT, as ToT deals mainly with commodities, suggesting that an increase in price will not discourage people from purchasing that product as it is regarded as a neccessity. An increased ToT is always favourable for a country whist a decreased ToT is unfavourable.
Hope this helps
