\psset{nodesep=1mm,levelsep=2cm,treesep=1cm, nrot=:U}
\pstree[treemode=R, xbbh = 10pt, xbbd=10pt]{\TC}{%
        \pstree{\TR{\blue $P$} \naput{\blue 0.5}}{% 
				\pstree{\TR{\blue $P$} \naput{\blue 0.5}}{%
						\pstree{\TR{\blue $P$} \naput{\blue 0.5}}{%
								\pstree{\TR{$P$} \naput{ 0.5}}{%
										\TR{$P$} \naput{ 0.5}
										\TR{$\bar{P}$} \nbput{0.5}
								}
								\TR{$\blue\bar{P}$} \nbput{\blue0.5}
						}
						\TR{$\blue\bar{P}$} \nbput{\blue0.5}
				}
				\TR{$\blue\bar{P}$} \nbput{\blue0.5}
		}
		\TR{$\blue\bar{P}$} \nbput{\blue0.5}
}