XGBoost Please help

⁠I am trying to train an xgboost model that estimates stock price. I don't think there is anything wrong with the data format, and I am using gridsearch to find the likely hyperparameters.... But this is what I get for the estimation. except for a small area, the graph is flat...! Why is this happening?

https://preview.redd.it/uzkt8fqxn4uc1.png?width=1954&format=png&auto=webp&s=b76f84d7910768b33692d0b9ee9d144f5e951984

https://preview.redd.it/no2qddf0o4uc1.png?width=1267&format=png&auto=webp&s=dbd1e1b51b0b87949046e27f1976967e11caea06

data data format datascience flat format graph price small stock stock price the graph think train xgboost