ee below please

Consider TSLA trading at Nasdaq and MSTLA  trading at Mirror.ONE trading platform
At all times TSLA PRICE = MTSLA Price

Say, at Time = T0
TSLA Price @ Nasdaq = $489.60
Therefore, MTSLA Price @ Mirror =  $489.60

Notes: MTSLA price doesn't change irrespective of buyers and sellers at Mirror. The trading platform is like Uniswap. So there is only one price that can be traded. (As compared to Binance where you can see the market depth)

Now, at Time = T1
TSLA Price @ Nasdaq = $495.00
Therefore, MTSLA Price @ Mirror =  $495.00

Notes: T1 could be 1 minute later, 2 hours later, several weeks or years later. Doesn't matter. This equation will always hold true. i.e TSLA Price = MTSLA Price. No one can tamper with this equation (not even the dev team)

So in short, if someone buys MSTLA at @489.60 and sells at $495.00, they would have replicated the returns of TSLA. The convenience is that you can buy MTSLA with ETH, USDT, or USDC easily (as compared to buying TSLA, where you have to convert your ETH into USD/GBP first)

MTSLA price will be sourced in a decentralized manner from multiple sources. Currently, all asset-tokens are executed against a price that is supplied by mirror oracles using price feeds from various authorised, however, centralized brokerage firms and two separate market data terminals e.g. Bloomberg and Reuters. As an added control, the price feed then goes through a secondary reconciliation with an error threshold of .002%. Price feed will be completely decentralized as the adoption grows.

Hope this helps, but happy to explain more.