  \begin{tikzpicture}[scale=0.5, domain = 0:4]
 
     % Axis
     \draw[<->, thick] (0,4) node (yaxis) [left] {$X_t$} 
        |- (11,0) node (xaxis) [right] {$t$} ;

     \draw[dashed, color=PineGreen] (1.5*6 cm, 4) -- (1.5*6 cm, -3pt) 
                         node[anchor=north] {$T $};

     \draw[dashed, color=PineGreen] (1.5*7,4) -- (1.5*7,-3pt) 
                         node[below] {$T+\delta$};

     \draw[color=PineGreen] plot[only marks, mark = *] file {tikz/data0.dat};

     \draw (0,0) -- (0,-3pt) node[below, color= PineGreen] {0};
     
    
  \end{tikzpicture} 
