The detection of \gamma -rays , antiprotons and positrons due to pair annihilation of dark matter particles in the Milky Way halo is a viable indirect technique to search for signatures of supersymmetric dark matter where the major challenge is the discrimination of the signal from the background generated by standard production mechanisms .
The new PAMELA antiproton data are consistent with the standard secondary production and this allows us to constrain exotic contribution to the spectrum due to neutralino annihilations .
In particular , we show that in the framework of minimal supergravity ( mSUGRA ) , in a clumpy halo scenario ( with clumpiness factor \geq 10 ) and for large values of \tan ( \beta ) \geq 55 , almost all the parameter space allowed by WMAP is excluded .

Instead , the PAMELA positron fraction data exhibit an excess that can not be explained by secondary production .
PPB-BETS and ATIC reported a feature in electron spectrum at a few hundred GeV .
The excesses seem to be consistent and imply a source , conventional or exotic , of additional leptonic component .

Here we discuss the status of indirect dark matter searches and a perspective for PAMELA and Fermi \gamma -ray space telescope ( Fermi ) experiments .