when the trend line cross the moving average 200 day from the bottom, what the action as investor will you do?

its chance to buy this stock

The200 Day Moving Average is a long term moving average that helps determine overall health of a stock.
The percentage of stocks above their200 Day Moving Average helps determine overall health of the market.
When this number gets below20%, many traders look for a sharp reversal in the market that can quickly bring the number up to40%.
When this number gets above85% or90%, many traders look for a reversal in the market.
The200 Day Moving Average often works as a major support level in a bull market.
This can present a low-risk opportunity to buy a stock, however a break below it can lead to a large gap downward.
In a bear market, the200 Day Moving Average often works as a major resistance level, however a break above it can lead to a sharp rise.
In a bull market, a buying signal may be generated as the stock dips close to the200 Day Moving Average and a sell signal may be generated when it goes far above its200 day Moving Average.
In a bear market, a buying signal may be generated when it dips far below its200 Day Moving Average, and a sell signal may be generated when it rises close to its200 Day Moving Average.

A move below the200 DMA suggests that the bears are in control of the price action and that the asset/market will likely move lower.
Conversely, a cross above a moving average suggests that the bulls are in control and that the price may be getting ready to make a move higher.