Certain cryptocurrencies are pegged to an underlying asset, such as the USD Coin (USDC), which is a stablecoin by Coinbase. A USDC token is issued for every $1 kept in Coinbases' reserve.
A pegged cryptocurrency can be pegged to any asset and then issued on a blockchain. As long as the cryptocurrency can be redeemed for the underlying asset, it can be considered as a pegged cryptocurrency.
It is a bullish signal in technical candlestick pattern by comparing two lines of short-term moving average and long-term average. It is a golden cross when the short term moving average broke its long-term moving average.